GRONINGSMETODER AV FRÖN





GRONINGSMETODER AV FRÖN




METOD  FÖRKLARINGAR 

1 Sås vid 20ºC, gror snabbt 

2 Sås vid 20ºC, gror sakta 

3 Sås vid 20ºC, om inget gror efter 3-4 veckors, flytta till +4ºC i 2-4 veckor 

4 Sås vid +4ºC i 4-8 veckor, flytta därefter till 20ºC för groning. 

5 Sås vid Max. 5ºC , gror oregelbunden, tar ofta flera månader 

6 Sås vid 20ºC, gror oregelbundet, tar ofta flera månader 

7 Sås vid 22-24ºC, gror snabbt 

8 Sås vid 18-22ºC,under 2-4 veckor, flytta därefter till +4ºC i 4-6 veckor, flytta åter till 5-12ºC här kommer fröna sedan att gro.                                        

9 Sås vid 18-22ºC under 2-4 veckor, flytta därefter till -6 till för 4-6 veckor, flytta åter till 5-12ºC här kommer fröna sedan att gro. 

10 Sås direkt utomhus. Fröt kommer att gro i vår. 

11 Sås som i metod 8. Gror mycket långsamt, kan ta mellan ett till två år. 

12 Långsamt groende upp till ett år eller mer. Förvara fröna i ett lager av fuktigt sand i skugga. Kontrollera fröna regelbundet varje vår, så snart som rötter har bildats skall plantan sås ut. 

13 Sås vid  22ºC  tar 6 veckor eller mer. Flytta till +4º i 6-8 veckor. Öka sedan temperatur till 10ºC. Gror inte fröt inom 4-6 veckor, upprepa  cykel från  början. Om  varma eller kalla cykeln inte varit tillräckligt lång, så behövs en ny varm/kall cykel . Bra kända exempel: Cimifuga & Helleborus.

14 Sås fuktigt vid 25-30ºC, 4-6 dagar. Flytta till 2ºC i mörker under 11-12 veckor. Öka sedan långsamt temperatur och ljuset nivåer. 

15 Frö täckta av hårda skal. Skaka fröna i torr skarp sand eller fila försiktigt med en fil. 

16 Häll hett vatten över fröna, låt dem blötas upp 1-3 dagar tills svullnaden är märkbar

17 Gros i låg temperaturer; 5-15ºC. Många av dessa arter kommer att gå bra i högre temperaturer. 





Kall period i kylskåp:




Snabb kyling kan förstöra  fröna. Sänk  temperaturen långsamt till  +4ºC. Placera Inte dem i kylskåpet direkt från rum temperatur. Vanliga såkrukor tar alltför stor plats i kylskåp. Det är bättre till placera  föna i en  plast påse eller i liten ask, blandad med fuktig sand. 



ART DATABAS, PERENNER

BOTANICAL NAME METHOD NO.  ADDITIONAL INFORMATION
Acaena magellanica 11  
Acaena microphylla 11  
Acaena microphylla 'Kupferteppich' 11  
Acaena novae-zelandiae 11  
Acaena pinnatifida 11  
Acaena saccaticupula 11  
Acantholimon acerosum 3 Acantholimon seeds germ. better after storage
Acantholimon acerosum var. brachystachyllum 3 Acantholimon seeds germ. better after storage
Acantholimon albanicum 3 Acantholimon seeds germ. better after storage
Acantholimon armenum var. armenum 3 Acantholimon seeds germ. better after storage
Acantholimon bracteatum 3 Acantholimon seeds germ. better after storage
Acantholimon bracteatum var. bracteatum 3 Acantholimon seeds germ. better after storage
Acantholimon dianthifolium 3 Acantholimon seeds germ. better after storage
Acantholimon glumaceum 3 Acantholimon seeds germ. better after storage
Acantholimon kotschyanum ssp. laxispicatum 3 Acantholimon seeds germ. better after storage
Acantholimion ulicinum 3 Acantholimon seeds germ. better after storage
Acantholimon ulicinum ssp. ulicinum 3 Acantholimon seeds germ. better after storage
Acantholimon ulicinum var. creticum 3 Acantholimon seeds germ. better after storage
Acanthus hungaricus (balcanicus) 05-aug Soak 1-2 days
Acanthus longifolius   Syn. A. hungaricus, see this
Acanthus mollis 2 or 5 Soak 1-2 days
Acanthus spinosus 2 or 5 Soak 1-2 days
Achillea ageratifolia 1  
Achillea filipendulina 1 thin cover, needs light, grow on at 10ºC (50ºF)
Achillea filipendulina 'Cloth of Gold' 1 thin cover, needs light, grow on at 10ºC (50ºF)
Achillea millefolium 'Kirchkönigen' syn.'Cerise Queen' 1  
Achillea millefolium 'Summer Pastels' 1  
Achillea ptarmica 1 thin cover, needs light, grow on at 10ºC (50ºF)
Achillea pyrenaica 1  
Achillea tomentosa 'Aurea' 1  
Aciphylla subflabellata 9  
Aconitum cammarum 9 Short viable
Aconitum carmichaelii var. wilsonii 9 Short viable
Aconitum carmiichaelii 9 Short viable
Aconitum lycoctorum var. neopolitanum 9 Short viable
Aconitum napellus 9 Short viable
Aconitum volubile 9 Short viable
Aconitum vulparia 9 Short viable
Actaea alba 8  
Actaea pachypoda   Syn. A. alba, see this
Actaea rubra 8  
Actaea spicata 8  
Adenophora bulleyana 5  
Adenophora coelestis 5  
Adenophora cymerhae 5  
Adenophora himalayana 5  
Adenophora lilifolia 5  
Adenophora nikoensis 5  
Adenophora pereskiifolia 5  
Adenophora pereskiifolia 'Alba' 5  
Adenophora polyantha 5  
Adenophora takedai v. howazana 5  
Adenophora tashiroi 5  
Adenophora triphylla 5  
Adenostyles alpina 3  
Adonis amurensis 10 Short viable
Adonis brevistyla 10 Short viable
Adonis pyrenaica 10 Short viable
Adonis vernalis 10 Short viable
Aethonema grandiflora 2  
Agastache anisata (syn. A. foeniculum - see this)    
Agastache foeniculum 2  
Agastache foeniculum 'Alba' 2  
Agastache mexicana ?  
Agastache pallidiflora 1  
Agastache rugosum 2  
Agastache rupestris 1  
Agastache scrophulariaefolia 4 8 wks @ 4ºC ( 40ºF), move to 20
Agoseris cuspidata 4 12 week cold period
Agropyron trachycaulum 4 12 week cold period
Agrostis hyemalis 4 12 week cold period
Agrostis scabra 4 12 week cold period
Alcea ficifolia 1 Usually biennial
Alcea rosea 1 Usually biennial
Alcea rosea 'Chaters' 1 Usually biennial
Alcea rosea 'Indian Spring' 1 Usually biennial . Flowers first year
Alcea rosea var. nigra 1 Usually biennial
Alcea rugosa 1  
Alchemilla alpina 9  
Alchemilla mollis 9  
Aletris farinosa 1  
Allium aflatunense 8  
Allium albopilosum 4 6 week cold period
Allium ampeloprasum 1  
Allium amphibolum 1  
Allium campanulatum ?  
Allium cernuum 8  
Allium christophii 8  
Allium cratericola ?  
Allium fistulosum 8  
Allium flavum 8  
Allium flavum 'Minor' 8  
Allium giganteum 8  
Allium mairei 1  
Allium moly 8  
Allium narcissiflorum 8  
Allium pulchellum 8  
Allium schoenoprasum 1 grow on in groups of 5 to 10 plants
Allium senescens 1  
Allium sphaerocephalum 8  
Allium splendens 1  
Allium sikkimense 1  
Allium tanguticum 4 3 week cold period
Alionopsis spatulata 1 Requires light to germ.
Alpinus alba 1 thin cover, needs light, grow on at 10ºC (50ºF)
Alstroemeria alstroemeria 'Flava' 5  
Alstroemeria aurantiaca 5  
Alstroemeria aurea (syn. A. aurantiaca - see this)    
Althaea officinalis 2  
Alyssoides utriculata 3  
Alyssum montanum 1  
Alyssum saxatile 1  
Alyssum saxatile 'Compactum' 1  
Alyssum scardicum    
Alyssum wulfenianum 1  
Amorpha canescens 1, 15  
Amsonia orientalis 5  
Amsonia tabernaemontana 5  
Anacyclus depressus 1  
Anaphalis margaritacea 1  
Anaphalis triplinervis 1  
Anarrhinum bellidifolium 2  
Anchusa azurea 2  
Anchusa azurea 'Dropmore' 2  
Ancusa officinalis 2  
Andropogon gerardi 4 12 week cold period
Andropogon scoparius 4 12 week cold period
Androsace albana 5 Often monocarpic
Androsace alpina 5 or 8  
Androsace armeriaca 5  
Androsace barbulata 5  
Androsace carnea 1 or 5  
Androsace carnea ssp. brigantiaca 1 or 5  
Androsace carnea ssp. laggeri 1 or 5  
Androsace carnea ssp. rosea 1 or 5  
Androsace carnea var. hallerii 1 or 5  
Androsace carnea x pyrenaica 1 or 5  
Androsace chamaejasme 5  
Androsace ciliata 5  
Androsace darwascia 3 or 5  
Androsace halleri 5  
Androsace hirtella 5  
Androsace languinosa 1  
Androsace mathildae 5  
Androsace pubescens 5  
Androsace pyrenaica 5  
Androsace sempervirens 1 or 5  
Androsace sericea 5  
Androsace spinulifera 5  
Androsace vandelii 3 or 5  
Androsace villosa 5  
Anemone baicalensis 2  
Anemone barbulata 2  
Anemone biarmensis ?  
Anemone canadensis 8  
Anemone caroliniana 3  
Anemone cylindrica 3  
Anemone drummondii 2  
Anemone gernica 2  
Anemone hupehensis 3  
Anemone hupehensis 'Splendens' 3  
Anemone hupehensis v. japonica 3  
Anemone lyallii 2  
Anemone multifida 8 or 3  
Anemone narcissiflora 3  
Anemone nemorosa 10  
Anemone obtusiloba  2  
Anemone parviflora 2  
Anemone rivularis 8 or 3  
Anemone rupicola 2  
Anemone sylvestris 2  
Anemone tomentosa 3  
Anemone vernalis 1  
Anemone virginiana 3  
Anemone vitifolia    
Anemone x lesseri 2 or 10  
Antennaria alpina 5  
Antennaria dioica 5  
Antennaria friesiana 5  
Antennaria magellanica 2  
Antennaria neglecta 5  
Antennaria parvifolia 5  
Antennaria plantaginifolia 5  
Antennaria rosea 5  
Anthemis nobilis 1 Syn. Chamaemelum nobile
Anthemis rudolphiana 1  
Anthemis sancti-johannis 1  
Anthemis tinctoria 1  
Anthemis tinctoria 'Kelwayi' 1  
Anthericum liliago 5  
Anthericum ramosum 5  
Anthyllis montana 8  
Anthyllis vulneraria 1  
Apocynum androsaemifolium 1  
Apocynum cannabinum 4 12 week cold period
Aquilegia alpina 5  
Aquilegia atrata 8  
Aquilegia aurea ?  
Aquilegia bertolonii 2 may take several months
Aquilegia caerulea 2  
Aquilegia caerulea 'Mrs Scott Elliot' 2  
Aquilegia canadensis 2 germinates in 2-5 weeks
Aquilegia chaphrii ?  
Aquilegia chrysantha 3  
Aquilegia clematiflora 2  
Aquilegia 'Crimson Star' 2 germinates in 2-3 weeks
Aquilegia 'Dragonfly' 2  
Aquilegia 'Dwarf Fairyland' 2  
Aquilegia flabellata 'Alba' 5  
Aquilegia flabellata 'Mini Star' 5  
Aquilegia flabellata nana 5  
Aquilegia flatabella var. pumila 5  
Aquilegia 'Floro Pleno' 2  
Aquilegia formosa 5  
Aquilegia formosa var. pauciflora 3  
Aquilegia glandulosa 2  
Aquilegia hybrid white, 30-40 cm 2  
Aquilegia laramiensis 2  
Aquilegia longissima 2  
Aquilegia 'McKana Giant' 2  
Aquilegia 'Nora Barlow' 2  
Aquilegia olympica 5 or 3  
Aquilegia 'Pom-pom' 5  
Aquilegia pubescens ?  
Aquilegia rockii 2  
Aquilegia scopulorum 2  
Aquilegia transylvanica 5  
Aquilegia vulgaris 2  
Aquilegia 'William Guiness' 2  
Arabis alpina 1 thin cover, needs light, grow on at 10ºC (50ºF)
Arabis aubrietoides 1  
Arabis blepharophylla 'Frühlingszauber' 1  
Arabis caucasica 1  
Arabis lyrata 4 12 week cold period
Arabis muralis 1  
Arabis procurrens 'Neuschnee' 1  
Arenaria balearica 5  
Arenaria festucoides 2 or 5  
Arenaria grandiflora 5  
Arenaria montana 2  
Arenaria pungens 5  
Arenaria purpurascens 5  
Arenaria rubella 2 or 5  
Arenaria stricta 4 12 week cold period
Arenaria tmolea 5  
Arisaema flavum 3  
Arisaema triphyllum 5  
Armeria canescens    
Armeria x 'Formosa' 1  
Armeria x formosa-hybr. 'Kieft Pastel Shades' 1  
Armeria leucocephala 1  
Armeria maritima 1  
Armeria maritima 'Arvi' 1  
Armeria maritima 'Leucheana Splendens' 1  
Armeria plantaginea (syn. alliacea) 2  
Armeria pseudoarmeria (syn. latifolia) 2  
Armeria rhodopensis 2  
Armeria tweedy 2  
Arnica alpina  1  
Arnica frigida 3  
Arnica montana 3  
Artemisia absinthium 1  
Artemisia ludoviciana 1  
Artemisia serrata 1  
Arum italicum 12  
Aruncus aethusifolius 4  
Aruncus dioicus 3  
Aruncus dioicus v. astilboides 3  
Aruncus sinensis 'Zweiweltenkind' 3  
Asarum canadense 13 Short viable 
Asarum europaeum 13  Short viable
Asclepias amplexicaulis 4 12 week cold period
Asclepias exaltata 4 4 wks @ 4ºC (40ºF) in moistened sand, grow on @ 16ºC (60ºF)
Asclepias fascicularis 2  
Asclepias hirtella 4 12 week cold period
Asclepias incarnata 2  
Asclepias incarnata 'Ice Ballet' 2  
Asclepias purpurascens 4 12 week cold period
Asclepias speciosa 1 Germinates in 1 week
Asclepias sullivanti 4 12 week cold period
Asclepias syriaca 2  
Asclepias tuberosa 2 Germinates in 2 weeks
Asclepias verticillata 4 12 week cold period
Asclepias viridiflora 4 12 week cold period
Asperula odorata 8  
Asphodeline liburnica 3  
Asphodeline lutea 3 or 5  
Asphodelus albus 11  
Asphodelus microcarpus 11  
Asphodelus ramosus 11  
Aster alpinus 1  
Aster alpinus 'Goliath' 1  
Aster alpinus 'Albus' 1  
Aster alpinus 'Dunkle Schöne' 1  
Aster alpinus 'Happy End' 1  
Aster amellus 2  
Aster amellus 'King George' 2  
Aster azureus 2  
Aster coloradoensis 2  
Aster coloradoensis (syn.Macheranthera c.) 2  
Aster cordifolius 'Ideal' 2  
Aster delawaii (diplostephoides) 1  
Aster ericoides 2  
Aster laevis 2  
Aster lateriflorus 'Horizontalis' 2  
Aster linariifolius 2  
Aster novae-angliae 2  
Aster novae-angliae 'Harringtons Pink' 2  
Aster novae-angliae 'Bar's Violet' 2  
Aster novi-belgii 2  
Aster oblongifolius 2  
Aster pilosus 2  
Aster ptarmicoides 2  
Aster puniceous 3  
Aster sagittifolius drummondii 2  
Aster sericeus 2  
Aster sibirica 2  
Aster simplex 2  
Aster stracheyi 1  
Aster tongolensis 'Wartburg Star' 2  Syn. 'Wartburgstern'
Aster umbellatus 2  
Aster x fricartii 'Mönch' 2  
Astilbe chinensis 1 thin cover, needs light, grow on at 16ºC (60ºF)
Astilbe chinensis var. pumila 1 small seed - do not cover
Astilbe simplicifolia 2  
Astilbe x japonica - hybrids 1  
Astilbe x arendsii 1 thin cover, needs light, grow on at 16ºC (60ºF)
Astilboides tabularis 1 Syn. Rodgersia t.
Astragalus alopecuroides 1 or 5  
Astragalus canadensis 1, 15  
Astragalus centralpinus 1, 15  
Astrantia major 8  
Astrantia major 'Shaggy' 8  
Astrantia major ssp. involucrata 8  
Astrantia maxima 8  
Aubrieta deltoidea cultivars 1  
Aubrieta x cultorum 'Grandiflora' 1  
Balsamorhiza hookeri  4  4 wks @ 4ºC (40ºF)
Balsamorhiza sagittata 8  
Baptisia alba 2 + 16  
Baptisia australis 2 + 16  
Baptisia leucantha 4 12 week cold period, subject to damping off
Baptisia leucophaea 4  
Baptisia pendula 2 + 16  
Belamcanda chinensis 2  
Bellis perennis 1  
Bellis perennis 'Pomponette Pink' 1  
Bellis perennis 'Pomponette Red' 1  
Bellis perennis 'Pomponette White' 1  
Bellis perennis 'Super Enorma Mix' 1  
Bellium crassifolium v canescens    
Bellium minutum    
Bergenia cordifolia 1 or 7 small seed - do not cover
Bergenia cordifolia 'Rotblum' 1 or 7 small seed - do not cover
Bergenia purpurascens 7  
Besoniella oregana 1  
Blephilia ciliata 4 12 week cold period
Bloomeria crocea 2  
Boltonia asteroides 1 thin cover, needs light, grow on at 16ºC (60ºF)
Boltonia latisquamia 'Nana' 3  
Bouteloua curtipendula 4 12 week cold period
Bouteloua gracilis  2  
Bouteloua hirsuta 4 12 week cold period
Bouykinia rotundiflora 3  
Braya alpina 1  
Buddleia davidii 1  
Bupleurum 1  
Bupthalmum salicifolius 2  
Cacalia atriplicifolia  4 12 week cold period
Cacalia tuberosa 4 12 week cold period
Calamagrostis 3  
Calamagrostis canadensis 10  
Calamintha grandiflora 8  
Calandrina grandiflora 1 Treat as annual in cold areas
Calandrina umbellata 2  
Calceolaria alba 1 small seed - do not cover
Calceolaria biflora 1 small seed - do not cover
Calceolaria chelidonioides 1 Small seed. Also easy by cuttings
Calceolaria falklandica 1 Small seed - do not cover
Calceolaria filthergillii 1 Small seed- do not cover
Calceolaria polyrrhiza 1 Small seed - do not cover
Calceolaria mexicana 1 Small seed - do not cover
Callirhoe involucrata 5  
Callirhoe triangulata 4 12 week cold period
Calochortus gunnisonii 3  
Calochortus nuttallii 3  
Calluna vulgaris 5 Small seed - do not cover.
Caltha palustris 5 or 8  
Caltha palustris 'Alba' 5 or 8  
Calylophus lavandulifolius 1  
Calyptocarpus vialis ?  
Camassia scilloides 4 12 week cold period
Campanula alliarifolia 1 thin cover, needs light, grow on at 16ºC (60ºF)
Campanula betulifolia 3  
Campanula burkhardtii    
Campanula carpatica 'Blue Clips' 2 small seed - do not cover
Campanula carpatica 'Deep Blue Clips' 2 small seed - do not cover
Campanula carpatica 'White Clips' 2 small seed - do not cover
Campanula cochlearifolia 1 or 5 small seed - do not cover
Campanula cochlearifolia 'Alba' 1 or 5 small seed - do not cover
Campanula cochlearifolia 'Hallii' 1 or 5 small seed - do not cover
Campanula collina 2 small seed - do not cover
Campanula garganica 13 small seed - do not cover
Campanula glomerata 1 germinates in 1-2 weeks
Campanula glomerata 'Acaulis' 1 germinates in 1-2 weeks
Campanula glomerata 'Alba' 1 germinates in 1-2 weeks
Campanula glomerata 'Superba' 1 germinates in 1-2 weeks
Campanula lactiflora 2  
Campanula latifolia 3  
Campanula lasiocarpa 1  
Campanula parryi 2  
Campanula persicifolia 1 small seed - do not cover
Campanula persicifolia 'Alba' 1 small seed - do not cover
Campanula persicifolia 'Telham Beauty' 1 small seed - do not cover
Campanula pilosa 3  
Campanula piperi 2  
Campanula portenschlagiana 5 small seed - do not cover
Campanula poscharskyana 3 small seed - do not cover
Campanula primualifolia    
Campanula pulla 5 small seed - do not cover
Campanula pulsilla 5 small seed - do not cover
Campanula punctata 3 germinates in 1-2 weeks
Campanula punctata rubriflora 5 germinates in 1-2 weeks
Campanula pyramidalis 3  
Campanula raineri 1 small seed - do not cover
Campanula rotundifolia 2 or 4 12 week cold period
Campanula takesimana    
Campanula thyrsoides 3 small seed - do not cover
Campanula trachelium 1 or 5 small seed - do not cover
Campanula tridentata 3  
Capparis spinosa var. inermis ?  
Cardamine bulbosa 4 12 week cold period
Carex atrata 3  
Carlina acaulis 3  
Caryopteris incana 1 thin cover, needs light, grow on at 16ºC (60ºF)
Catananche caeruleum 1  
Catananche caeruleum 'Bicolor' 1  
Ceanothus americanus 4 12 week cold period
Centaurea alpina 2  
Centaurea bella 2  
Centaurea dealbata 1  
Centaurea dealbata 'Steenbergii' 1  
Centaurea macrocephala 1  
Centaurea macrocephala 'Sophia' 1  
Centaurea montana 2  
Centaurea nigra 1 germinates in 1-2 weeks
Centaurea phrygia 1  
Centaurea pulcherrima 2  
Centaurea uniflora 2  
Centranthus ruber 'Coccineus' 1  
Centranthus ruber var. albus 'Snowcloth' 1  
Cephalanthus occidentalis 1  
Cephalaria alpina 5  
Cephalaria gigantea 3  
Cerastium biebersteinii 1  
Cerastium tomentosum 1 thin cover, needs light, grow on at 16ºC (60ºF)
Chaenorrhinum origanifolium 1  
Chamaemelum nobile 1  
Chelidonium japonicum 1  
Chelone glabra 3  
Chelone obliqua 3 or 4 6 week cold period
Chelone obliqua 'Alba' 3 or 4 6 week cold period
Chiastophyllum oppositifolium 8 small seed - do not cover. Method 5 or 3 may work
Chrysanthemum cinerariifolium - syn. Tanacetum c. 1 germinates in 1-2 weeks
Chrysanthemum coccineum 2 usually low germ. percent
Chrysanthemum leucanthemum 1 spreading
Chrysanthemum maximum 1  
Chrysanthemum maximum 'Mayfield Giants' 1  
Cichorium intybus 3  
Cicuta maculata 1  
Cimicifuga racemosa 13  
Cimicifuga ramosa 13  
Cimicifuga simplex 13  
Cimicifuga simplex 'Atropurpurea' 13  
Cirsium japonicum 2  
Clayttonia megrhiza var nivalis 2  
Clematis alpina 3  
Clematis integrifolia 3  
Clematis macropetala 3  
Clematis occidentalis var. dissecta ?  
Clematis recta 8  
Clematis tangutica 3  
Clematis texensis 8  
Clematis virginiana 2  
Clematis vitalba 8  
Clematis viticella 3 or 8  
Codonopsis bhtuanica 3 small seed - do not cover
Codonopsis clematidea 3 small seed - do not cover
Codonopsis lanceolata 3 small seed - do not cover
Codonopsis ovata 3 small seed - do not cover
Codonopsis pilosula 3 small seed - do not cover
Codonopsis tangshen 3 small seed - do not cover
Colchicum autumnale 12  
Colchicum cilicicum 12  
Convallaria majalis 8 Poisonous
Convolvulus sepium syn. Calystegia sepium 10 weedy
Convolvulus spithamaeus 10 weedy
Coreopsis grandiflora 'Early Sunrise' 1 germinates in 1-2 weeks
Coreopsis lanceolata 2  
Coreopsis lanceolata 'Sunray' 2  
Coreopsis palmata 2  
Coreopsis tripteris 2  
Coreopsis verticillata ?  
Coreopsis verticillata 'Moonbeam' ?  
Cortaderia selloana, pink 7  
Cortaderia selloana, white 7  
Cortusa matthiola 3  
Cortusa turkestanica 3  
Corydalis bulbosa (see C. cava)    
Corydalis cava 8 Short viable
Corydalis cheilanthifolia 13 Short viable
Corydalis curvisiliqua 10 germinates in the fall, sow fresh only
Corydalis heterocarpa    
Corydalis lutea 13 Short viable
Corydalis nobilis 13 Short viable
Corydalis ochroleuca 13 Short viable
Corydalis racemosa 2 Short viable. Germinates in 4-8 weeks
Corydalis sempervirens 2 Short viable
Corydalis solida 13 Short viable
Corydalis solida f. transsylvanica 13 Short viable
Crambe cordifolia 5  
Crambe maritima 5  
Cremanthodium ellisii 1  
Crocosmia 'Lucifer' 2  
Crocosmia masonorum 2  
Crucianella stylosa (syn. Phuosis stylosa) 2  
Cryptantha paradoxa 1  
Cyanathus lobatus 3  
Cyclamen cilicium 2 Germ. Dark in 18 C
Cyclamen hederifolium 2 Germ. Dark in 18 C
Cymbalaria muralis 1  
Cymopterus planosus 3  
Cynoglossum glochidatum 5  
Cynoglossum officinale 5  
Cytisus purpureus 1 shrub
Danthonia spicata 4 12 week cold period
Darmera peltata (syn. Peltiphyllum peltatum) 13  
Delosperma cooperi 1  
Delphinium 'Blue Mirror' 7  
Delphinium cardinale 7  
Delphinium cashmirianum 1  
Delphinium chinense 1  
Delphinium chinense 'Butterfly Blue' 1  
Delphinium elatum 7  
Delphinium glareosum 7  
Delphinium glaucum 7  
Delphinium grandiflorum 7  
Delphinium nudicaule 7  
Delphinium nudicaule var. luteum 7  
Delphinium pacific giant - hybrids 7  
Delphinium pacific giant 'Galahad' 7  
Delphinium pacific giant 'King Arthur' 7  
Delphinium pacific giant 'Summer Skies' 7  
Delphinium patens var. montanum 7  
Delphinium requinni 7  
Delphinium virescens 7  
Desmodium canadense 4 12 week cold period
Desmodium illinoense 12  
Desmodium sessilifolium 4 12 week cold period
Dianthus 'La Bourboule' 1  
Dianthus allwoodii 1  
Dianthus alpinus 3  
Dianthus amurensis 1  
Dianthus arenarius 1  
Dianthus armeria    
Dianthus x arvernensis 1  
Dianthus carthusianorum 1  
Dianthus caryophyllus 1  
Dianthus deltoides 1  
Dianthus deltoides 'Vampir' 1  
Dianthus deltoides 'Zing Rose' 1  
Dianthus 'Dottie' white 1  
Dianthus 'Fiery Cross' 1  
Dianthus glacialis 8  
Dianthus gratianopolitanus (caesius) 1  
Dianthus 'Karlish Train' 1  
Dianthus knappii 1  
Dianthus neglectus (pavonius) 3  
Dianthus 'Pink Jewel' 1  
Dianthus plumarius 1  
Dianthus sequieri 1  
Dianthus siberia 1  
Dicentra chrysantha ?  
Dicentra cucullaria 8 4 wks @ 20ºC (70ºF), 12 wks @ 4ºC (40ºF), move to 12ºC ( 53ºF)
Dicentra peregrina 8 4 wks @ 20ºC (70ºF), 12 wks @ 4ºC (40ºF), move to 12ºC ( 53ºF)
Dicentra scandens 3  
Dicentra spectabilis 8  
Dicentra spectabilis 'Alba' 8  
Dicentra torulosa    
Dicranostigma lactuoides ?  
Dictamnus albus 9 Short viable
Dictamnus albus 'Albiflorus' 9 Short viable
Dictamnus albus var. caucasicus 9 Short viable
Digitalis grandiflora 1 small seed - do not cover
Digitalis lutea 1 small seed - do not cover
Digitalis purpurea 1 small seed - do not cover
Digitalis purpurea 'Gloxiniaeflora' 1 small seed - do not cover
Dionysia involucrata 2  
Dodecatheon conjugens 5 moist
Dodecatheon dentata 5 moist
Dodecatheon meadia 5 moist
Dodecatheon pulchellum 5 Moist
Dodecatheon redolens 5 moist
Doronicum orientale (caucasicum) 1  
Doronicum orientale 'Magnificum' 1 germinates in 1-2 weeks
Doronicum pardalinches 2  
Douglasia laevigata 5 or 8  
Douglasia laevigata var. ciliolata 5 or 8  
Douglasia nivalis 5 or 8  
Draba acuminata    
Draba aizoides 1  
Draba brunnifolia 1  
Draba cappadocica  
Draba crassifolia  1  
Draba hispanica 1  
Draba hispanica sequieri 1  
Draba igarishii  1  
Draba incerta  1  
Draba kitadakensis  1  
Draba oligosperma  1  
Draba parnassica 1  
Draba paysonii 1  
Draba rosularis 1  
Draba setosa 1  
Dracocephalum bullatum ?  
Dracocephalum canescens 5 sow at 4ºC (40ºF), very slow to germ.
Dracocephalum ruyschianum 5  
Dryas drummondii 5  
Dryas integrifolia 5  
Dryas octopetala 5  
Dryas x suendermanii 5  
Duchesnea indica 3  
Eccremocarpus 'Peaches & Cream'  5  
Echinacea 'Bright Star' 3  
Echinacea 'Bravado' 3  
Echinacea 'White Luster' 3  
Echinacea pallida 3  
Echinacea paradoxa 8 9 weeks at 4ºC (40ºF), move to 10ºC (50ºF)
Echinacea 'Purple Magnus' 3  
Echinaea purpurea 3  
Echinacea tennesseensis 8 9 weeks at 4ºC (40ºF), move to 10ºC (50ºF)
Echinops bannaticus 1  
Echinops bannaticus 'Alba' 1  
Echinops ritro 1  
Echinops sphaerocephalus 1  
Edraianthus graminifolius 5 small seed - do not cover
Edraianthus pumilio 5  
Edraianthus serbicus    
Edraianthus tenuifolius 3 small seed - do not cover
Eleocharis compressa 1  
Eleocharis elliptica 1  
Elymus canadensis 4 12 week cold period
Engelmannia pinnatifida ?  
Eragrostis curvula ?  
Eragrostis spectabilis 4 12 week cold period
Eranthis hiemalis 10 Short viable 
Eremurus aitchisonii 14  
Eremurus altaicus var. fuscus 14  
Eremurus bungei (syn. E. stenophyllus) 14  
Eremurus himalaicus 14  
Eremurus robustus 14  
Eremurus stenophyllus ssp. stenophyllus 14  
Erigeron aurantiacus 5  
Erigeron hybridus 2  
Erigeron hysopifolia ?  
Erigeron leiomerus ?  
Erigeron myosotis 1  
Erigeron speciosus 2 needs darkness to germinate
Erinus alpinus 1  
Erinus alpinus 'Mrs Chas Boyle' 1  
Eriophyllum lanatum 2  
Eritrichium canum    
Eritrichum caucasicum 3 small seed - do not cover
Eritrichum kamtschaticum 3 small seed - do not cover
Eritrichium nanum 8  
Eritrichium pectinatum    
Eritrichium sibiricum    
Eritrichum terglouense 3 small seed - do not cover
Erodium manescavii 2  
Erodium pelargonifolium 2  
Eryngium agavifolium 3  
Eryngium alpinum 8  
Eryngium alpinum 'Blue Star' 8  
Eryngium amethystinum 5  
Eryngium bourgattii 8  
Eryngium caeruleum    
Eryngium campestre 5  
Eryngium giganteum 8  
Eryngium glaciale 8  
Eryngium horridum    
Eryngium palmatum 8  
Eryngium pandanifolium    
Eryngium planum 3  
Eryngium yuccifolium 3  
Erythronium dens-canis 5  
Erythronium grandiflorum 8  
Erythronium hendersonii 8  
Erythronium montanum 8  
Erythronium oregonum 8  
Erythronium revolutum 8  
Eupatorium altissimum 4 12 week cold period
Eupatorium cannabium 2  
Eupatorium chinense v. simplicifolia 3 sow on surface - needs light, If no germ after 4 wks, give 4 wks cold period
Eupatorium coelestinum 3  
Eupatorium greggii 3 sow on surface - needs light, If no germ after 4 wks, give 4 wks cold period
Eupatorium maculatum 'Atropurpureum' 1  
Eupatorium perfoliatum 4 8 week cold period
Eupatorium purpureum 3  
Eupatorium rugosum 2  
Euphorbia corollata 4 12 week cold period
Euphorbia griffithii 11  
Euphorbia lathyris 1 or 5  
Euphorbia marginata    
Euphorbia myrsinites 1 thin cover, needs light, grow on at 10ºC (50ºF)
Euphorbia palustris 2  
Euphorbia polychroma 2  
Filipendula hexapetala 2  
Filipendula rubra 3  
Filipendula ulmaria 8  
Filipendula vulgaris (hexapetala) 2  
Fragaria vesca 5  
Fragaria vesca 'Rügens' 2  
Fragaria virginiana 4 12 week cold period
Francoa sochnifolia 2  
Frasera speciosa 4 6 wks @ 4ºC (40ºF)
Fritillaria camtchatcensis 5  
Fritillaria imperialis var. lutea 5  
Frittilaria meleagris 5  
Fritillaria pallidiflora 5  
Fritillaria pyrenaica 5  
Fuchsia magellanica 5  
Gaillardia aristata  1  
Gaillardia grandiflora 1  
Gaillardia grandiflora 'Goblin' 1  
Gaillardia lorenziana 2 sow on surface @ 23ºC (73ºF) - needs light, grow on at 10ºC (50ºF)
Gaillardia 'Red Plume' 1  
Galega officinalis 1 thin cover, needs light, grow on at 10ºC (50ºF)
Galium boreale 4 12 week cold period
Galium obtusum 4 12 week cold period
Galium tinctorium 4 12 week cold period
Galtonia candicans 2  
Gaultheria procumbens 5  
Gaultheria shallon 8  
Gaura lindheimeri 2  
GENTIANA (general description) 8 Should work for all species. Other methods are 3,4 and 5
Gentiana acaulis 8 cover thin
Gentiana andrewsii v. Alba 8 cover thin
Gentiana angustifolia 8 cover thin
Gentiana asclepiadea 8 cover thin
Gentiana asclepiadea 'Rosea' 8 cover thin
Gentiana brachyphylla 8 cover thin
Gentiana calycosa 8 cover thin
Gentiana clusii 8 cover thin
Gentiana crinita 8 cover thin
Gentiana cruciata 3 cover thin
Gentiana dahurica 3 cover thin
Gentiana dinarica 8 cover thin
Gentiana flavida 4 12 week cold period
Gentiana freyniana 8 cover thin
Gentiana frigida 8 cover thin
Gentiana froelichii 8 cover thin
Gentiana gracilipes 3 cover thin
Gentiana kochiana - syn G. acaulis 8 Cover thin
Gentiana kurroo 3 cover thin
Gentiana lutea 8 cover thin
Gentiana makinoi 8 do not cover
Gentiana makinoi Royal Blue 8 do not cover
Gentiana makinoi white 8 do not cover
Gentiana nivalis 8 cover thin
Gentiana oliveri 3 cover thin
Gentiana pannonica 8 cover thin
Gentiana parryi 8 cover thin
Gentiana puberula 4 12 week cold period
Gentiana purpurea 8 cover thin
Gentiana quinquefolia 4 12 week cold period
Gentiana saxosa 8 cover thin
Gentiana septemfida 3 or 17 do not cover
Gentiana septemfida var. lagodeckiana 3 or 17 do not cover
Gentiana straminea 3 cover thin
Gentiana thianscanica 3 cover thin/do not cover
Gentiana tibetica 3 cover thin/do not cover
Gentiana verna 8 cover thin
Geranium armenium ?  
Geranium asphodeloides 1 sow at 13ºC (55ºF)
Geranium endressii 2  
Geranium erianthum    
Geranium himalayense 1 sow at 13ºC (55ºF)
Geranium macrorrhizum 2  
Geranium maculatum 4 8 week cold period
Geranium oxonianum 'Claridge Druce' 1 sow at 13ºC (55ºF)
Geranium palmatum 1  
Geranium phaeum 2  
Geranium phaeum 'Album' 2  
Geranium pratense 2 or 8  
Geranium psilostemon 1 sow at 13ºC (55ºF)
Geranium pyrenaicum 2 or 5  
Geranium sanguineum 2 or 5  
Geranium swatense 5  
Geranium sylvaticum 2  
Gerardia aspera 4 12 week cold period
Gerardia gattingera 4 12 week cold period
Gerardia tenuifolia 4 12 week cold period
Geum chilolense 'Lady Stratheden' ('Goldball') 1 germinates in 1-2 weeks
Geum chilolense 'Mrs. Bradshaw' ('Fireball') 1 germinates in 1-2 weeks
Geum coccineum 3 thin cover, needs light, grow on at 10ºC (50ºF)
Geum montanum 5  
Geum rivale 3  
Geum triflorum 4 12 week cold period, subject to damping off
Gillenia trifoliata 8  
Glaucidium palmatum 8 2 cold periods often required
Glaucidium palmatum 'Album' 8 2 cold periods often required
Glaucium flavum 3  
Glaucium vitellianum 1  
Globularia aphyllanthes    
Globularia cordifolia    
Globularia nudicaulis 3  
Globularia punctata 3  
Globularia 'Horts Variety' ?  
Glyceria striata 4 12 week cold period
Goniolimon tataricum (syn. Limonium tatarica) 1  
Goniolimon tataricum 'Woodcreek' 1  
Gunnera manicata 7  
Gunnera scabra 7  
Gypsophila paniculata 'Snowflake' 2  
Gypsophila repens 2  
Gypsophila tenuifolia gracilipes 2  
Haberlea ferdinandi-coburgii    Small seed - do not cover
Haberlea rhodopensis 3 Small seed - do not cover
Hebe 'Carl Techner' ?  
Hebe albicans    
Hebe margret    
Hebe pimeloides    
Hedysarum alpinum 3  
Hedysarum boreale 3  
Hedysarum coronarium 3  
Helenium autumnale 3  
Helenium hoopesii 2  
Helianthemum 'Red Orient' 5  
Helianthemum apenninum 'Roseum' 5  
Helianthemum bicknelli 4 12 week cold period
Helianthemum canadense 4 12 week cold period
Helianthemum nummularium 1  
Helianthus decapetalus 5  
Helianthus grosseserratus 4 12 week cold period
Helianthus lactiflorus var. rigidus 4 12 week cold period
Helianthus maximiliani 5  
Helianthus mollis 4 12 week cold period
Helianthus occidentalis 4 12 week cold period
Helianthus rigidus (laetiflorus) 'Miss Mellish' 5  
Helianthus strumosus 4 12 week cold period
Helichrysum arenarium 1  
Helichrysum aureum ?  
Helichrysum hybrid 'Schneefellicht' ('Sulphur Light') 1  
Helichrysum splendidum    
Helichrysum thianshankum 1  
Heliopsis helianthoides (syn. H. scabra) 3  
Heliopsis scabra 'Plena' 3  
Helleborus argutifolius 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus foetidus 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus lividus 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus niger 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus orientalis 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus orientalis ssp. guttatus 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus orientalis var. abchasicus 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus purpurescens 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus viridis 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Helleborus x sternii 13 + 16 Helleborus seeds short viable. Soak for 1-2 days
Hemerocallis hybrids 5 Not true to type
Hemerocallis liliasphodelus 5  
Hepatica nobilis 10  
Hepatica triloba 5  
Hesperis matronalis 2 or 7 Very spreading ! Cover thin. Needs light.
Heuchera americana 2  
Heuchera brizoides 2  
Heuchera hallii ?  
Heuchera micracanta 'Palace Purple' 2  
Heuchera nicratum 2  
Heuchera richardsonii (hispida) 4 12 week cold period
Heuchera sanguinea 'Splendens' 2  
Heuchera sanguinea 'Fackel' 2  
Heuchera versicola 2  
Heuchera villosa 'Purpurera' 2  
Heucherella 'Bridget Bloom' ?  
Heucherella tiarelloides ?  
Hibiscus (Rose Mallow) 7  
Hibiscus syriacus 1  
Hieracium longipilum 4 12 week cold period
Hierochloe odorata 4 12 week cold period
Horminum pyrenaicum 3  
Hosta montana 3  
Houstonia caerulae 4 12 week cold period
Humulus lupulus 5  
Hutchinsia alpina 2  
Hymenoxys acaulis 3  
Hymenoxys grandiflora 3  
Hypericum ascyron 8  
Hypericum calycinum 8  
Hypericum olympicum 2  
Hypericum perforatum 2  
Hypericum x androsaemum 'Albury Purple' 2  
Hypoxis hirsuta 1  
Hyssopus officinalis 1  
Iberis sempervirens  1 needs light. Cover thin.
Incarvillea cheron 1  
Incarvillea chinensis 'Alba' 1  
Incarvillea delavayi 1  
Incarvillea emodii 1  
Inula ensifolia 2  
Inula helenium 2  
Inula magnifica 2  
Inula orientalis 2  
Iris chrysographes 8 + 15  
Iris foetidissima 8 + 15  
Iris hollandica 3 + 16  
Iris lactea 8 + 15 Soak for 1-2 days
Iris pseudacorus 8 + 15 Soak for 1-2 days
Iris setosa 5 + 15 Soak for 1-2 days
Iris setosa ssp. canadensis 5 + 15 Soak for 1-2 days
Iris sibirica 8 + 15  
Iris tenax 8 + 15 Soak for 1-2 days
Iris variegata 8 + 15 Soak for 1-2 days
Iris virginica shrevei 4 12 week cold period
Jasione laevis 1  
Jasione montana 1  
Jasione perennis (syn. J. laevis - see this) 1  
Kitabela vitifolia 5  
Knautia arvensis 5  
Knautia macedonica 3  
Kniphofia hybrids 1 or 17  
Kniphofia uvaria 1 or 17 thin cover, needs light, grow on at 16ºC (60ºF)
Kniphofia 'Yellow hammer' 1 or 17  
Koeleria cristata 4 12 week cold period
Krigia biflora 4 12 week cold period
Krigia virginica 4 12 week cold period
Kuhnia eupatorioides 4 12 week cold period
Lamium maculatum 8  
Lapeirousia laxa (syn. Anomatheca laxa) 1  
Lathyrus latifolius 2 + 16  
Lathyrus palustris 3 + 16 12 week cold period, inoculate
Lathyrus venosus 3 + 16 12 week cold period, inoculate
Lathyrus vernus 3 + 16  
Lavandula angustifolia 3  
Lavandula angustifolia 'Munstead' 3  
Lavandula laciniata 3  
Lavandula stoechas 3  
Lavatera arborea 8 alternate temperatures on 12 wk cycles
Leibnitzia anandria 1  
Leibnitzia kunzeana 1  
Leibnitzia nepalensis 1  
Leonurus cardiaca 3  
Leonurus marrubiastrum 1  
Leontodon crispum 3  
Leontopodium alpinum 1  
Leontopodium nivale spp. nivale ?  
Leontopodium wilsonii ?  
Lespedeza capitata 12  
Lespedeza hirta 12  
Lespedeza leptostachya 12  
Lespedeza thunbergii 1, 15  
Levisticum officinalis 1  
Lewisia brachycalyx 5 or 8  
Lewisia columbiana 8  
Lewisia cotyledon 5 or 8  
Lewisia cotyledon 'Alba' 5 or 8  
Lewisia longipetala 8  
Lewisia nevadensis 5 or 8  
Lewisia oppositifolia 5 or 8  
Lewisia pygmaea 5 or 8  
Lewisia pygmaea ssp. longipetala 5 or 8  
Lewisia rediviva 8  
Lewisia sierrae 8  
Lewisia tweedyi 5 or 8  
Liatris aspera 4 12 week cold period
Liatris cylindracea 4 12 week cold period
Liatris earlei 2  
Liatris graminifolia 2  
Liatris ligulistylis 4 12 week cold period
Liatris mucronata 8 3 months at 4ºC ( 40ºF), many empty seeds, grow on @ 10ºC (50ºF)
Liatris pycnostachya 2  
Liatris spicata 1  
Liatris spicata 'Floristan Weiss' 1  
Liatris spicata 'Alba' 1  
Liatris squarrosa 2  
Ligularia clivorum (see L. dentata) 2 Ligularia seeds often poor quality 
Ligularia dentata 2  Ligularia seeds often poor quality 
Ligularia dentata 'Desdemona' 2  Ligularia seeds often poor quality 
Ligularia fischeri 2  Ligularia seeds often poor quality 
Ligularia macrophylla 2  Ligularia seeds often poor quality 
Ligularia przewalskii 2  Ligularia seeds often poor quality 
Ligularia sibirica 2  Ligularia seeds often poor quality 
Ligularia stenocephala 2  Ligularia seeds often poor quality 
Ligularia 'The Rocket' 2  Ligularia seeds often poor quality 
Ligularia veitchiana 2  Ligularia seeds often poor quality 
Ligularia wilsoniana 2  Ligularia seeds often poor quality 
Lilium formosanum 1 sow at 10ºC (50ºF)
Lilium martagon 5  
Lilium michiganense 4 12 week cold period
Lilium oxypetalum var. insigne (syn. Nomocharis) 5  
Lilium philadelphicum var. endinum 4 12 week cold period
Lilium pumilum 1 sow at 10ºC (50ºF)
Lilium pyrenaicum 5  
Lilium regale 5  
Limonium latifolium 1  
Limonium tataricum - see Goniolimon t. 1  
Linaria aerugina 1  
Linaria aerugina nevadensis 1  
Linaria alpina 1  
Linaria purpurea 'Canon J.Went' 1  
Linaria supina 8  
Lindelofia longiflora 8  
Linum cariense ?  
Linum flavum 1  
Linum lewisii 1  
Linum perenne 1  
Lithospermum canescens 4 12 week cold period
Lithospermum croceum 4 12 week cold period
Lithospermum officinale    
Lithospermum incisum 4 12 week cold period
Lithospermum purpureo-caeruleum (syn. Buglossoides p.) 8  
Loasa sp. 1  
Lobelia cardinalis 7 do not cover
Lobelia siphilitica 2 do not cover
Lobelia spicata 4 12 week cold period
Lobelia x gerardii 'Vedrariensis' 7 do not cover
Lopezia racemosa 1 needs winter protection
Lotus corniculatus 1  
Lunaria biennis 1 thin cover, needs light, grow on at 10ºC (50ºF). Biennial
Lupinus arboreus 2 + 16 Germination irregular 
Lupinus perennis 2 or 4 12 week cold period
Lupinus podophyllus / Russel-hybrids 1  Germination irregular
Lupinus texensis 2 + 16  
Lycene teunifolium 1 germinates in 1 week
Lychnis alpina (syn. Viscaria alpina) 1 germinates in 1-2 weeks
Lychnis chalchedonica 1 germinates in 1-2 weeks
Lychnis coronaria (syn. Agrostemna c.) 1 Seedlings can be violet or white/violet
Lychnis flos-cuculi 1  
Lychnis flos-jovis 1  
Lychnis flos-jovis f. Nana 1  
Lychnis viscaria 'Plena' (syn. Viscaria vulgaris) 1 germinates in 1-2 weeks
Lychnis x arkwrightii 1 germinates in 1-2 weeks
Lychnis x haageana 1 Seedlings can be red, orange or white. Germinates in 1 week
Lychnis yunnanensis 1 germinates in 1-2 weeks
Ludwigia alternatifolia 4 6 wks @ 4ºC (40ºF)
Ludwigia hexapetala 4 6 wks @ 4ºC (40ºF)
Lycopus virginicus 4 6 wks @ 4ºC (40ºF)
Lysimachia atropurpurea 5  
Lysimachia barystachys 8  
Lysimachia clethroides 3  
Lysimachia ephemerum 3  
Lysimachia lanceolata 4 12 week cold period
Lysimachia lichiangensis 1  
Lysimachia punctata 3  
Lysimachia quadriflora 4 12 week cold period
Lythrum alatum 4 12 week cold period
Lythrum salicaria 3 Spreading. Illegal in some states in the US
Macleaya cordata 3  
Madia elegans 4 6 wks @ 4ºC (40ºF)
Malva alcea fastigiata 5  
Malva arbourea variegata 1  
Malva moscata 'Alba' 1  
Malva moscata 'Rosea' 1  
Malva neglecta 1  
Malva sylvestris 'Zebrina' 1  
Marrubium incanum 1  
Marrubium suppinum 1  
Marrubium vulgare 3  
Marshalia trinervia 5  
Meconopsis x beamishii 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis aculeata 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis betonicifolia 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis betonicifolia 'Alba' 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis cambrica 3 or 17 Meconopsis germ. quicker in a peat- based soilless compost
Meconopsis cambrica 'Muriel Brown' 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis lancifolia 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis dhwojii 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis grandis 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis horridula 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis horridula racemosa 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis integrifolia 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis napaulensis 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis punicea 10 Short viable.Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis quintuliplinervia 10 Short viable.Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis regia 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Meconopsis x sheldonii 3 or 17 Meconopsis germ. quicker in a peat-based soilless compost
Medicago sativa 1  
Megacarpaea polyandra 1  
Melandrium - see Silene    
Melissa officianalis 1  
Mentha requienii    
Mertensia primuloides 1  
Mertensia pterocarpa    
Meum athamanticum 10 short viable
Micromeria 5  
Mimulus cardinalis 1 do not cover. Germinates in 1 week
Mimulus cupreus 'Red Emperor' 1 do not cover. Germinates in 1 week
Mimulus guttatus 1 do not cover.
Mimulus lewisii 1 do not cover
Mimulus luteus 1 do not cover
Mimulus luteus 'Tigrinus Grandiflorus' 1 do not cover. Germinates in 1 week
Mitella pentandra 8 do not cover
Monarda 'Panorama' 1  
Monarda astromontana 1 thin cover, needs light, grow on at 10ºC (50ºF)
Monarda didyma 1  
Monarda fistulosa 3  
Monarda hybrida 1  
Monarda punctata 1 thin cover, needs light, grow on at 10ºC (50ºF)
Morina longifolia 5  
Muhlenbergia cuspidata 4 12 week cold period
Muhlenbergia glomerata 4 12 week cold period
Muhlenbergia racemosa 4 12 week cold period
Myosotis alpestris 1  
Myosotis palustris 1  
Myosotis sylvatica 1 thin cover, needs light, grow on at 10ºC (50ºF)
Myosotis 'Victoria Blue' 1  
Myrrhis odorata 10 Short viable 
Nepeta cataria 1 or 3 cover, needs darkness, grow on at 16ºC (60ºF)
Nepeta clarkei 1 sow in dark, grow on @ 10ºC (50ºF)
Nepeta dirphya 1 sow in dark, grow on @ 10ºC (50ºF)
Nepeta nuda 1 cover, needs darkness, grow on at 16ºC (60ºF)
Nepeta subsessilis 2  
Nepeta teydea 1 sow in dark, grow on @ 10ºC
Nepeta x fassenii 1  
Nepeta x fassenii 'Six Hills Giant' 1  
Nomocharis farreri 5  
Nomocharis saluenensis 5  
Oenothera acaulis 1  
Oenothera argilicola 1  
Oenothera berlandierii 1  
Oenothera biennis 1 Biennial
Oenothera caespitosa macroglottis 1  
Oenothera caespitosa ssp. caespitosa 1  
Oenothera caespitosa ssp. navajoensis 1  
Oenothera fruticosa 1  
Oenothera laciniata 1  
Oenothera missouriensis 1  
Oenothera odorata sulphurea 'Lemon Sunset' 1  
Oenothera pallida runciniata 1  
Oenothera perennis 4 12 week cold period
Oenothera pilosella 1  
Oenothera rhombipetala 1  
Oenothera rosea 1  
Oenothera tetragona 1  
Oenothera versicolor 1  
Opuntia fragilis 4 12 week cold period
Opuntia humifusa 4 12 week cold period
Origanum vulgare 1  
Orobanche fasiculata 4 12 week cold period
Osteospermum jucundum 1  
Oxytropis campestris 2  
Oxypolis rigidor 1  
Paeonia lactiflora 12 + 15  
Paeonia mlokosewitschii 12 + 15  
Paeonia officinalis 12 + 15  
Paeonia tenuifolia 12 + 15 2 cold periods required 
Paeonia veitchii 12 + 15  
Panicum lanuginosum var. lindheimeri 4 12 week cold period
Panicum leibergii 4 12 week cold period
Panicum oligosanthes var. scribnerianum 4 12 week cold period
Panicum perlongum 4 12 week cold period
Panicum praecocius 4 12 week cold period
Panicum virgatum 4 12 week cold period
Papaver alboroseum ?  
Papaver alpinum 1 do not cover
Papaver burseri 1 do not cover
Papaver kerneri 1 do not cover
Papaver miyabeanum 2  
Papaver nudicaule 1 do not cover
Papaver nudicaule 'Wind Song' 1 do not cover
Papaver orientale 1 do not cover
Papaver orientale 'Allegro' 1 do not cover
Papaver orientale 'Beauty of Livermere' 1 do not cover
Papaver orientale 'Brilliant' 1 do not cover
Papaver orientale 'Pizzicato' 1 do not cover
Papaver radicatum 3 do not cover
Papaver rhaeticum 1 do not cover
Papaver sendtneri 1 do not cover
Papaver triniifolium 3 do not cover
Paradisea liliastrum 8  
Paradisea liliastrum 'Major' 8  
Pardancanda norrissii 2  
Parnassia palustris 8  
Parthenium integrifolium 2 or 4 12 week cold period
Patrinia triloba 1  
Pedicularis canadensis 1  
Pedicularis chamissonis v japonica ?  
Pedicularis procera 1  
Peltiphyllum peltatum (syn. Darmera peltata) 13  
Peltoboykinia tellimoides (syn. Boykinia t.) 3  
Peltoboykinia watanabei 3  
Pennisetum alopecuroides 3  
Pennisetum compressum 'Hameln' 7  
Pennisetum compressum 'Little Bunny' 7  
Pennisetum setaceum 7  
Penstemon albidus 5  
Penstemon alpinus 5 after 8 wks, allow temperatures to oscillate
Penstemon angustifolium 5  
Penstemon barbatus (syn. Chelone b.) 5  
Penstemon barbatus 'Coccineus' 5  
Penstemon brozos 5  
Penstemon cobaea 5  
Penstemon cyaneus 5  
Penstemon davidsonii 5  
Penstemon digitalis 5  
Penstemon digitalis 'Husker Red' 5  
Penstemon eatonii 5  
Penstemon englaucus 5  
Penstemon glaber 5  
Penstemon globosus 5  
Penstemon grandiflorous 4 6 week cold period
Penstemon hartwegii 2  
Penstemon heterophyllus 2  
Penstemon hirsutus 4 6 week cold period
Penstemon ovatus 5  
Penstemon pallidus 4 6 week cold period
Penstemon palmeri 5  
Penstemon pinifolius 5  
Penstemon pseudospectabilis 4 6 week cold period
Penstemon rostriflorus (syn. P. bridgesii) 5  
Penstemon 'Souvenir d'Adrian Requier' 5  
Penstemon strictus 4 8-12 week cold period, needs light to germinate
Penstemon whippleanus 5  
Periploca graeca 4 4 wks in 4ºC (40ºF)
Perovskia atriplicifolia 6  
Petalostemum candidum 12  
Petalostemum purpureum 12  
Petalostemum villosum 12  
Petrorhagia saxifraga 1  
Phalaris canariensis 1 sow 3-4 or more seeds in one clump.
Phlomis cashmeriana 5  
Phlomis italica 5  
Phlomis russeliana 5 or 7  
Phlox glaberrima var. interior 10  
Phlox maculata    
Phlox paniculata 8  
Phlox pilosa 10  
Phuosis stylosa (syn. Crucianella stylosa) 2  
Phygelius aequalis 7  
Phygelius capensis 7  
Phyla incisa ?  
Physalis franchetii (syn. P.alkekengi var. franchetii) 1  
Physalis subglabrata 4 12 week cold period
Physalis virginiana 4 12 week cold period
Physoplexis comosa 8  
Physostegia virginiana 4 12 week cold period, not true to type
Phyteuma humile 3  
Phyteuma pharmelii    
Phyteuma scheuchzeri 2  
Phyteuma sibiricum 3  
Phyteuma spicata 3  
Phytolacca americana 8  
Phytolacca octandra    
Platycodon apoyama 2 germinates in 2-4 weeks
Platycodon grandiflorus 2 germinates in 2-4 weeks
Poa palustris 4 12 week cold period
Podophyllum hexandrum 8 + 16 Soak for 1-2 days. Short viable
Podophyllum hexandrum 'Majus' 8 + 16 Soak for 1-2 days. Short viable
Podophyllum emodi (hexandrum)   See P. hexandrum
Polemonium caeruleum 1  
Polemonium caeruleum 'Album' 1  
Polemonium carneum 2  
Polemonium cashmirianum 2  
Polemonium chartaceum 2  
Polemonium delicatum 2  
Polemonium elegans ?  
Polemonium eximium ?  
Polemonium foliosissimum 2  
Polemonium pauciflorum 2  
Polemonium pulcherrimum ?  
Polemonium reptans 2  
Polemonium viscosum 1  
Polemonium x rickharsonii 2  
Polygonatum canaliculatum 4 12 week cold period
Polygonum bistorta 8  
Polygonum capitatum 2  
Polytaenia nuttallii 4 12 week cold period
Potentilla alba 2  
Potentilla arguta 4 12 week cold period
Potentilla argyrophylla (syn. P.atrosanguinea var.arg.) 2  
Potentilla atrosanguinea 2  
Potentilla aurea 2  
Potentilla canadensis 4 12 week cold period
Potentilla concolor 2  
Potentilla crantzii 2  
Potentilla fissa    
Potentilla fragiformis 2  
Potentilla fruticosa 4 12 week cold period
Potentilla hybrid 'Emilie' 2  
Potentilla megalantha 2  
Potentilla multifida 1  
Potentilla nepalensis 'Firedance ' 2  
Potentilla nepalensis 'Ms Willmot' 2  
Potentilla pensylvanica 1  
Potentilla recta 1 or 3  
Potentilla thurberi 1  
Prenanthes alba 4 6 wks @ 4ºC (40ºF)
Prenanthes aspera 4 12 week cold period
Prenanthes racemosa 4 12 week cold period
Primula alpicola 3  
Primula aurantiaca    
Primula auricula 8  
Primula beesiana 8  
Primula bullesiana 8  
Primula bulleyana 8  
Primula bullesiana 8  
Primula burmanica 8  
Primula chungensis 8  
Primula cockburniana 3  
Primula cortusoides 2  
Primula denticulata 1 do not cover
Primula denticulata 'Rubin' 1 do not cover
Primula elatior 'Colossea mix' 1  
Primula farinosa 1  
Primula floridae 1  
Primula frondosa 5  
Primula halleri 1  
Primula japonica 8 or 5  
Primula juliae 13  
Primula mistassia macropetala    
Primula nutans 1  
Primula pedemontana 8  
Primula polyantha-hybrids (elatior) 1  
Primula polyneura 2  
Primula pubescens 3  
Primula pulverulenta 8  
Primula rosea 8  
Primula saxatilis 2  
Primula scotica 5  
Primula sieboldii 8  
Primula sikkimensis 2  
Primula veris 1  
Primula veris ssp. macrocalyx 1  
Primula verticillata 5  
Primula viallii 1  
Primula vulgaris 3  
Primula waltonii 3  
Prunella grandiflora 1  
Prunella vulgaris 3  
Prunella webbiana 3  
Psoralea argophylla 4 12 week cold period
Psoralea esculenta 4 12 week cold period
Psoralea tenuiflora 4 12 week cold period, subject to damping off
Pterocephalus perennis ssp. perennis 3  
Ptilotrichum spinosum 'Roseum' 2  
Pulmonaria saccarata 1 sow at 10ºC (50ºF)
PULSATILLA (general description) 4 or 8 Method 5, or even 3, usually works for Pulsatilla
Pulsatilla alba 8  
Pulsatilla albana 8  
Pulsatilla albana var. georgica 8  
Pulsatilla alpina 8  
Pulsatilla alpina 8  
Pulsatilla alpina ssp. alba 8  
Pulsatilla alpina ssp. alpina 8  
Pulsatilla alpina ssp. apiifolia 8  
Pulsatilla ambigua 8  
Pulsatilla dahurica 8  
Pulsatilla halleri 8  
Pulsatilla halleri ssp.taurica 8  
Pulsatilla montana 8  
Pulsatilla occidentalis 8  
Pulsatilla patens 8  
Pulsatilla patens ssp. teklae 8  
Pulsatilla patens var. wolfgangiana 3  
Pulsatilla pratensis 8  
Pulsatilla serotina 8  
Pulsatilla vernalis 8  
Pulsatilla vulgaris 8  
Pulsatilla vulgaris 'Alba' 8  
Pulsatilla vulgaris 'Rubra' 8  
Pulsatilla vulgaris ssp. grandis 8  
Pycnanthemum incanum 1  
Pycnanthemum tenuifolium 4 12 week cold period
Pycnanthemum virginianum 4 12 week cold period
Ramonda myconi 17 Sow on fine,peat-based soil, do not cover. Keep cool, moist, in shade.
Ranunculus aconitifolius 9 Short viable
Ranunculus amplexicaulis 8 Short viable
Ranunculus fascicularis 9  
Ranunculus nivicola 9  
Ranunculus pyrenaeus 9  
Ranunculus rhomboides 9  
Ratibida columnaris 1  
Ratibita pinnata 1  
Rhodiola rhodonta    
Rhodiola rosea 8 do not cover
Rhodiola semenovii 8 do not cover
Rodgersia podophylla 2 do not cover
Rodgersia sambucifolia 1 do not cover
Rodgersia tabularis 1 do not cover
Romneya coulteri 13-dec very difficult. Try GA3.
Romneya trichocalyx 5 very difficult. Try GA3. Method 12 may be an alternative
Roscoea alpina 5 + 15  
Roscoea purpurea 7  
Rosmarinus officinalis 1 thin cover, needs light, grow on at 16ºC (60ºF)
Rosularia sempervivum ?  
Rudbeckia fulgida 'Goldstrum' 3  
Rudbeckia 'Herbstsonne' ?  
Rudbeckia laciniata 'Goldquelle' 2  
Rudbeckia maxima 5  
Rudbeckia neumannii ?  
Rudbeckia nitida 2  
Rudbeckia occidentalis 2  
Rudbeckia subtomentosa 2  
Rudbeckia triloba 5  
Ruellis humilis 4 12 week cold period
Ruta graveolens 1  
Sagina subulata 1  
Sagittaria sagittifolia 7 Sow in WET soil/mud
Salvia farinacea 1 Annual in cold areas
Salvia forskaohlei 1  
Salvia jurisicii 2  
Salvia miltiorrhiza 1 Needs light to germinate
Salvia nemorosa 2  
Salvia officinalis 1  
Salvia pratensis 2  
Salvia sclarea 1  
Salvia transylvanica 2  
Salvia x superba 'Blue Queen' 1  
Salvia x superba 'Rose Queen' 1  
Sanguinaria canadensis 12 short viable
Sanguisorba canadensis 3  
Sanguisorba hakusanensis 3  
Sanguisorba menziesii    
Sanguisorba minor    
Sanguisorba obtusa 3  
Sanguisorba officinalis 1 thin cover, needs light, grow on at 16ºC (60ºF)
Sanguisorba parviflora 3  
Sanguisorba tenuifolia 3  
Santolinia chamaecyparissus 5  
Santolinia rosmarinifolius 5  
Saponaria ocymoides 1  
Saponaria pulvinaris    
Saponaria x wiemaniana ?  
Satureja montana 2  
Saxifraga 'Purple Robe' 2 do not cover
Saxifraga 'Southside Seedling'    
Saxifraga biflora 8 do not cover
Saxifraga burseriana 8 do not cover
Saxifraga callosa   do not cover
Saxifraga cochlearis 8 do not cover
Saxifraga cotyledon 8 Do not cover
Saxifraga cuneifolia 8 do not cover
Saxifraga diapensioides 8 do not cover
Saxifraga exarata 8 do not cover
Saxifraga exarata ssp. moschata 8 do not cover
Saxifraga ferdinandi-coburgi rhodopea 8 do not cover
Saxifraga granulata 8 do not cover
Saxifraga grisebachii 8 Do not cover
Saxifraga hostii 8 do not cover
Saxifraga hypnoides   do not cover
Saxifraga marginata 8 Do not cover
Saxifraga oppositifolia 8 Do not cover
Saxifraga paniculata 2 do not cover
Saxifraga pennsylvanica 4 12 week cold period
Saxifraga sachalinensis 3 do not cover
Saxifraga sempervivum 8 do not cover
Saxifraga sempervivum stenophyllum 8 do not cover
Saxifraga spathularis 8 Do not cover
Saxifraga stellaris 8 Do not cover.
Saxifraga stribrnyi 8 do not cover
Saxifraga umbrosa 8 Do not cover
Saxifraga x urbium 8 Do not cover
Saxifraga x arendsii cultivars 2 do not cover
Scabiosa caucasica 7  
Scabiosa caucasica 'Perfecta' 7  
Scabiosa columbaria 5  
Scabiosa japonica 'Alpina' 1  
Scutellaria baicalensis 1  
Scutellaria indica 'Blue' 3  
Scutellaria parvula 3  
Sedum album 1 do not cover
Sedum anacampseros 2 do not cover
Sedum dasyphyllum ? do not cover
Sedum floriferum 2 Do not cover
Sedum forsterianum 1 do not cover
Sedum kamtschaticum 2 do not cover
Sedum oreganum 2 do not cover
Sedum pilosum   Do not cover
Sedum reflexum - syn. S. rupestre. See this    
Sedum rupestre 1 thin cover, needs light, grow on at 16ºC (60ºF)
Sedum spathulifolium 5 Do not cover
Sedum spurium 1 do not cover
Sedum spurium 'Coccineum' 1 do not cover
Sedum takesimense ? do not cover
Sedum telephium 8 Do not cover
Semiaquilegia adoxiodes 5  
Semiaquilegia ecalcarata 5  
Sempervivum arachnoideum 3 Do not cover
Sempervivum calcareum 3 do not cover
Sempervivum grandiflorum 3 do not cover
Sempervivum grandiflorum montanum 3 do not cover
Sempervivum tectorum 3 Do not cover
Senecio aureus 4 12 week cold period
Senecio pauperculus 4 12 week cold period
Senecio plattensis 4 12 week cold period
Sidalcea hybrida 1 or 5  
Sidalcea malvaflora 1 or 5  
Silene alpestris 1  
Silene apetalum (syn. Melandrium a.) 1  
Silene armeria  1  
Silene asterias 3  
Silene bellidoides 1 or 7 Needs light to germ. 
Silene californica 3  
Silene caryophylloides ssp. echinus 2  
Silene cf. sedoides ?  
Silene coeli-rosea    
Silene dioica 2  
Silene elisabethae 8  
Silene frivaldskiana    
Silene hookerii 2  
Silene maritima 3  
Silene maritima 'Druett' (variegated) 3  
Silene nigrescens 1  
Silene nutans 2  
Silene pusilla 3  
Silene regia 3  
Silene saxifraga 1  
Silene schafta 'Splendens' 1  
Silene zawadskii 3 or 8  
Silphium dentata 4 12 weeks @ 4ºC (40ºF)
Silybum marianum v. sily 1  
Silphium integrifolium 4 12 week cold period
Silphium laciniatum 4 12 week cold period
Silphium perfoliatum 4 12 week cold period
Silphium terebinthinaceum 2  
Sisyrinchium albidum 3  
Sisyrinchium angustifolium 3  
Sisyrinchium angustifolium 'Album' 3  
Sisyrinchium bellum 2  
Sisyrinchium campestre 3  
Sisyrinchium depauperatum    
Sisyrinchium douglasii (grandiflorum) 3  
Sisyrinchium macrocarpum    
Sisyrinchium montanum 3  
Sisyrinchium striatum 2  
Smilacina racemosa 12  
Smilacina stellata 4 12 week cold period
Soldanella alpina 3 or 8  Very slow-growing the first 2-3 years
Soldanella carpatica 3 or 8  Very slow-growing the first 2-3 years
Solidago altissima 1  
Solidago caesia 1  
Solidago canadensis 1  
Solidago gigantea 1  
Solidago 'Goldkind' 1  
Solidago graminifolia 1  
Solidago juncea 1  
Solidago missouriensis var. fasciculata 1  
Solidago nemoralis 1  
Solidago pinetorum 1  
Solidago puberula 1  
Solidago remota 1  
Solidago riddellii 1  
Solidago rigida 1  
Solidago sempervirens 1  
Solidago speciosa 1  
Solidago sphacelata 1  
Solidaster luteus (Aster x Solidago) 8 Very poor germination
Sorghastrum nutans 4 12 week cold period
Spartina pectinata 4 12 week cold period
Sphenopholis intermedia 4 12 week cold period
Spiranthes cernua 4 12 week cold period
Sporobolus asper 4 12 week cold period
Sporobolus cryptandrus 4 12 week cold period
Sporobolus heterolepsis 4 12 week cold period
Stachys coccinea 1  
Stachys grandiflora 2  
Stachys lanata (S. byzantina) 2  
Stachys monnieri 5  
Stachys officinalis 5  
Stachys palustris var. homotricha 4 12 week cold period
Stipa spartea 4 12 week cold period
Stipa viridula 4 12 week cold period
Stokesia laevis 5 or 3  
Stylophorum diphyllum 5  
Swertia kingii 8  
Swertia perennis 8  
Symphanandra hoffmanii 1  
Symphyandra wanneri 1  
Tanacetum cineariifolium - syn. Chrysanthemum c. 1  
Tanacetum niveum 1 thin cover, needs light, grow on at 16ºC (60ºF)
Tanacetum parthenium - syn. Chrysanthemum p. 1 thin cover, needs light, grow on at 16ºC (60ºF)
Tanacetum vulgaris 1 thin cover, needs light, grow on at 16ºC (60ºF)
Telekia speciosa 1  
Tellima grandiflora 1  
Tephrosia virginiana 4 12 week cold period
Teucrium nassilense 3  
Teucrium canadense 3  
Teucrium chamaedrys 5  
Teucrium flavum 3  
Teucrium hircanieum    
Teucrium hyrcanicum    
Thalictrum aquilegifolium 3  
Thalictrum chelidonii 3  
Thalictrum dasycarpum 3  
Thalictrum delavayi 3  
Thalictrum dipterocarpum 3  
Thalictrum flavum 3  
Thalictrum minus 3  
Thalictrum revoltum 3  
Thalictrum rockebrunnianum 3  
Thaspium trifoliatum 4 12 week cold period
Thermopsis lanceolata 1 + 15 Soak for 1-2 days. Short viable
Thermopsis montana 1, 15  
Thymus mastichina    
Thymus serphyllum 1  
Thymus vulgaris 1  
Townsendia grandiflora 1  
Townsendia incana 1  
Tradescantia andersoniana 2  
Tradescantia ohiensis 4 12 week cold period
Trichostema dichotoma 1  
Tricyrtis dilatata    
Tricyrtis hirta 8  
Trifolium rubens 2  
Trillium cernuum 12 + 10 Very short viable. Store seed cold and moist. Sow fresh!
Trillium cumeatum 12 + 10 Very short viable
Trillium erectum 12 + 10 Very short viable. Store seed cold and moist. Sow fresh!
Trillium grandiflorum 12 + 10 Very short viable. Store seed cold and moist. Sow fresh!
Trillium luteum 12 + 10 Very short viable
Trillium sessile 12 + 10 Very short viable. Store seed cold and moist. Sow fresh!
Trillium sessile 'Rubrum' 12 + 10 Very short viable. Store seed cold and moist. Sow fresh!
Trillium undulatum 12 + 10 Very short viable
Tripterospemum marianum 1 germinates in 1 week
Trollius acaulis 9  
Trollius altaicus 9  
Trollius chinensis 9  
Trollius chinensis 'Golden Queen' 9  
Trollius europaeus 9  
Trollius pumilus 9  
Trollius yunnanensis 9  
Tropaeolum ciliatum 8 + 15 or 16 Soak for 1-2 days. Short viable
Tropaeolum speciosum 8 + 15 or 16 Soak for 1-2 days. Short viable
Typha angustifolia 8 Sow in mud
Umbilicus rupestris    
Valeriana ciliata 4 12 week cold period
Vania campylophylla 1 grow on in 10-15 C in good light
Verbascum bombyciferum 1 Verbascum seed is viable in perhaps 100 years! Cover thin
Verbascum chaixii 'Album' 1 Verbascum seed is viable in perhaps 100 years! Cover thin
Verbascum olympicum 1 Verbascum seed is viable in perhaps 100 years! Cover thin
Verbascum phoeniceum 1 Verbascum seed is viable in perhaps 100 years! Cover thin
Verbascum thapsus 1 Verbascum seed is viable in perhaps 100 years! Cover thin
Verbena bonariensis 1  
Verbena halei ?  
Verbena hastata 5  
Verbena stricta 4 12 week cold period
Verbesina virginica 3  
Vernonia altissima 4 90 days @ 4ºC (40ºF), raise temps to 24ºC (75ºF) very slowly
Vernonia baldwinii 4 90 days @ 4ºC (40ºF), raise temps to 24ºC (75ºF) very slowly
Vernonia fasciculata 4 12 week cold period
Vernonia missurica 4 90 days @ 4ºC (40ºF), raise temps to 24ºC (75ºF) very slowly
Vernonia novaborensis 4 12 week cold period, move to 24ºC (75ºF)
Veronica austriaca 1 thin cover, needs light, grow on at 16ºC (60ºF)
Veronica austriaca 'Knallbläu' 1  
Veronica fruticans 3  
Veronica gentianoides 3  
Veronica incana 1 thin cover, needs light, grow on at 16ºC (60ºF)
Veronica longifolia 1 thin cover, needs light, grow on at 16ºC (60ºF)
Veronica repens 2  
Veronica spicata 1  
Veronica spicata ssp. incana 1  
Veronica teuchrium - see V. austriaca ?  
Veronica(strum) virginianum (syn. Veronica virg.) 2 do not cover
Veronicastrum virginianum 'Rosea' 2 Do not cover
Veronicastrum virginianum 'Roseum' 2 do not cover
Vicis americana 4 12 week cold period
Viguera dentata 2  
Vinceloxicum hirundinaria    
Viola altaica    
Viola columbine 1 name may not be valid
Viola cornuta 'Arkwright Ruby' 1  
Viola cornuta 'Bambini Mix' 1  
Viola cornuta 'Princess Lavender & Yellow' 1  
Viola cornuta 'Princess Purple & Gold' 1  
Viola cornuta 'Purple Blaze' 1  
Viola cornuta 'White Perfection' 1  
Viola cornuta 'Yellow Perfection' 1  
Viola corsica 2  
Viola elatior 3  
Viola epipsela    
Viola jooi    
Viola labradorica 1  
Viola lanceolata 4 12 week cold period
Viola lutea    
Viola nigra 2  
Viola obliqua 'Alba' (V. cucullata) 5  
Viola odorata 8  
Viola odorata 'The Czar' 8  
Viola papilionacea 4 12 week cold period
Viola pedatifida 4 12 week cold period
Viola petata var. lineariloba 4 12 week cold period
Viola 'Rodney Davey' 5  
Viola sagittata 4 12 week cold period
Viola sororia 4 12 week cold period
Viola striata ?  
Vitaliana primuliflora 8  
Vitis vulpina 4 12 week cold period
Vulpia octoflora var. tenella 4 12 week cold period
Wahlenbergia congesta 3  
Wulfenia bullii 4 12 week cold period
Wulfenia carinthiaca 8 do not cover
Yucca filamentosa 7  
Zauschneria californica    
Zigadenus elegans 2  
Zigadenus nuttallii 2  
Zizea aptera 4 12 week cold period
Zizea aurea 4 12 week cold period
-----------------------------------------------------------------------------------------------------------
Hej!
Prova att göra en egen hemsida precis som jag.
Det är enkelt och du kan prova helt gratis.
ANNONS