Seed Germination Database - Perennials

D to N

Jump to alpha letter: | A to C |  E  |  F  |  G  |  H  |  I  |  J  |  K  |  L  |  M  |  N  |  O to Z  |

Danthonia spicata , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Daphne giraldii, mezereum, and sericea ,  Slow germinator - up to a year or more. Store seeds in layers of moist sand in the shade. Check seeds regularly in the spring, and sow them all as soon as radicles appear

Darmera peltata (syn. Peltiphyllum peltatum) , Sow at 22ºC (71ºF) for 6 wks or more. Move to -4 to +4ºC (24-39ºF) for 6-8 wks. Then raise the temperature to 10ºC (50ºF). If no germination in 4-6 wks, repeat the cycle from the beginning. If the warm/cold cycles were not long enough, a new warm/cold cycle is needed.

Datisca cannabina , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Degenia velebitica , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Delosperma cooperi, and sutherlandii , Sow at 20ºC (68ºF), germinates in less than two wks

Delphinium belladonna, cardinale, cashmirianum, chinense, elatum, glareosum, glaucum, grandiflorum, nudicaule, patens, requinni, and tatsienense  , Sow at 22-24ºC (71-75ºF), germination in less than 2 weeks

Delphinium exaltatum, and zalil , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Dentaria enneaphyllos , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Deschampsia caespitosa, and flexuosa , Sow at 20ºC (68ºF), germination slow

Desmodium canadense, and sessilifolium , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germ.

Desmodium illinoense , Slow germinator - up to a year or more. Store seeds in layers of moist sand in the shade. Check seeds regularly in the spring, and sow them all as soon as radicles appear

Dianthus allwoodii, amurensis, arenarius, x arvernensis, barbatus, carthusianorum, caryophyllus, cruentus, deltoides, gratianopolitanus, knappii, microlepis, monspessulanus, myrtinervius, nardiformis, nitidus, petraeus, pinifolius, plumarius, pontederae, pyrenaicus, x roysii, sequieri, siberica, subacaulis, superbus, and sylvestris  , Sow at 20ºC (68ºF), germinates in less than two wks

Dianthus alpinus,  neglectus, and pavonius , Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Dianthus glacialis , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Dianthus strictus v. bebius , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Diapensia lapponica , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Dicentra cucullaria, eximia, formosa, peregrina, and spectabilis , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination , short viable seed - sow immediately after harvest

Dicentra scandens , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Dichelostemma pulchellum ,  Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Dictamnus albus, fraxinella, and ruber , Sow at 23ºC (73ºF) for 6-8 wks, move to +4ºC (39ºF) for 6-8 wks, raise temperatures slowly to10ºC (50ºF) for germination, recycle, as germination may take a second year.  Short viable

Dierama pendulum, and pulcherrimum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Digitalis ambigua, eriostachya, ferruginea, grandiflora, laevigata, lanata, lutea, x mertonensis, obscura, parviflora, purpurea, and thapsi ,  Surface sow at 20ºC (68ºF) in light, germinates in less than two wks

Dionysia aretioides, involucrata, and teucrioides , Sow at 20ºC (68ºF), germination slow

Dipsacus pilosus , Slow germinator - up to a year or more. Store seeds in layers of moist sand in the shade. Check seeds regularly in the spring, and sow them all as soon as radicles appear

Dipsacus sativus, and sylvestris , Sow at 20ºC (68ºF), germination slow

Dodecatheon conjugens, dentata, meadia, pulchellum, and redolens , Sow at Max. 5ºC (41ºF), germination irregular, often several months moist

Dodecatheon clevelandii, and tetrandrum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Doronicum orientale , Scarify seed, Sow at 20ºC (68ºF), germinates in less than two wks

Doronicum austriacum, and pardalinches , Scarify seed, Sow at 20ºC (68ºF), germination slow

Dorycnium hirsutum, and pentaphyllum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Douglasia laevigata, and nivalis , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for irregular germination

Draba aizoides, borealis, bruniifolia, cretica, hispanica, lasiocarpa, loiseleurii, parnassica, paysonii, ramosissima, rosularis, sakuraii, and setosa , Sow at 20ºC (68ºF), germinates in less than two wks

Dracocephalum argunense, canescens, grandiflorum, nutans, ruyschianum, and speciosum , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Dracocephalum botryoides , Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Dracunculus vulgaris , Sow under very thin cover at 20ºC (68ºF) in light and constant humidity, germinates in less than two wks if temperatures are held at or above that level.

Drosera rotundifolia , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Dryas drummondii, integrifolia, octopetala, and x suendermanii , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Duchesnea indica , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Eccremocarpus scaber , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Echinacea pallida, and purpurea , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Echinacea angustifolia, paradoxa, and tennesseensis , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to 4ºC (40ºF) for 9 wks, move to 10ºC (50ºF) for germination

Echinops bannaticus, ritro, and sphaerocephalus , Sow at 20ºC (68ºF), germinates in less than two wks

Echium italicum, russicum, and vulgare , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Edraianthus graminifolius, and pumilio , Sow at Max. 5ºC (41ºF), germination irregular, often several months small seed - do not cover

Edraianthus serpyllifolius, and tenuifolius , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks small seed - do not cover

Elsholtzia stauntonii , Sow at 20ºC (68ºF), germination slow

Eleocharis compressa, and elliptica , Sow at 20ºC (68ºF), germinates in less than two wks

Elymus arenarius, and canadensis , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Eminium spiculatum , Sow under very thin cover at 20ºC (68ºF) in light and constant humidity, germinates in less than two wks if temperatures are held at or above that level.

Empetrum nigrum , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Epilobium angustifolium, dodonaei, fleisheri, and hirsutum ,  Surface sow at Max. 5ºC (41ºF), germination irregular, often several months

Eragrostis curvula, and trichodes ,  Sow at 20ºC (68ºF) in light, if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Eragrostis spectabilis , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Eranthis hiemalis , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Eremurus aitchisonii, altaicus v. fuscus, bungei, himalaicus, robustus, and stenophyllus , Sow moist at 25-30ºC (77-87ºF) for 4-5 wks. Move to 2ºC (35ºF) in darkness for 11-12 wks. Slowly raise temperature and light levels.

Erianthus contortus ,  Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Erianthus ravennae, and strictus , Sow at 20ºC (68ºF), germinates in less than two wks

Erica arborea , Surface sow at Max. 5ºC (41ºF), germination irregular, often several months

Erigeron glaucus, hybridus, karvinskianus, and trifidus , Sow at 20ºC (68ºF), germination slow

Erigeron aurantiacus, and myosotis , Sow at 20ºC (68ºF), germinates in less than two wks

Erigeron speciosus , Sow at 20ºC (68ºF), germination slow needs darkness to germinate

Erinus alpinus , Surface sow at 20ºC (68ºF), germinates in less than two wks

Eriogonum fasciculatum, and umbellatum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Eriophorum angustifolium, and vaginatum ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Eriophyllum lanatum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Eritrichum caucasicum , kamtschaticum, and terglouense , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks small seed - do not cover

Eritrichium nanum , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Erodium acaule , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Erodium manescavii, and pelargonifolium , Sow at 20ºC (68ºF), germination slow

Eryngium agavifolium, maritimum, pandanifolium, planum, tripartitum, and yuccafolium, Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Eryngium alpinum, bourgatii, giganteum, glaciale, palmatum, and spinalba , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination . Best if sown immediately after harvest.

Eryngium amethystinum, and campestre , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Erysimum allionii, helveticum, hybridum, and pumilum , Sow at 20ºC (68ºF), germination slow

Erythronium dens-canis, grandiflorum , hendersonii, montanum, oregonum, and revolutum, Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Eupatorium ageratoides, and coelestinum,  ,  Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Eupatorium altissimum , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Eupatorium cannabium, perfoliatum, and rugosum, Sow at 20ºC (68ºF), germination slow

Eupatorium chinense v. simplicifolia, and greggii , Sow on surface at 20ºC (68ºF) in light, if no germination in 4 wks, move to -4 to +4ºC (24-39ºF) for 4 wks, recycle

Eupatorium maculatum, and sessilifolium , Sow at 20ºC (68ºF), germinates in less than two wks

Eupatorium purpureum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Euphorbia amygdaloides, characias, corollata, longifolia, nicaeensis, rigida, seguieriana, and wallichii , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Euphorbia cyparissias, dulcis, and griffithii , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) very slow germinator,

Euphorbia lathyris , Sow at 20ºC (68ºF), if no germ. in 2 wks, move to -4 to +4ºC (24-39ºF) for irregular germination

Euphorbia marginata , Sow at 20ºC (68ºF), germinates in two wks sow in situ outdoors, will not transplant

Euphorbia myrsinites , Sow at 20ºC (68ºF), germinates in less than two wks thin cover, needs light

Euphorbia palustris, and polychroma , Sow at 20ºC (68ºF), germination slow

Ferula assa-foetida, and communis , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Festuca amethystina, gigantea, glauca, and ovina,  Sow at 20ºC (68ºF), germinates in about two wks

Festuca pulchella, scoparia, and valesiaca , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Fibigia clypeata , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Filipendula hexapetala , Sow at Max. 5ºC (41ºF) for 6 wks, move to 20ºC (68ºF), germination slow

Filipendula rubra, and ulmaria , Sow at 18-22ºC (64-71ºF) for 12 wks, move to -4 to +4ºC (24-39ºF) for 12 wks, move to 5-12ºC (41-53ºF) for germination, sow immediately after harvest.

Foeniculum vulgare ,  Sow at 20ºC (68ºF), germinates in less than two wks

Fragaria vesca , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Fragaria hybrida , Sow at 20ºC (68ºF), germination slow

Fragaria virginiana , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Francoa sochnifolia , Sow at Max. 5ºC (41ºF), germination irregular

Frasera speciosa , Sow at 4ºC (40ºF) for 6 wks, move to 20ºC (68ºF) for germination

Fritillaria imperialis, lanceolata, meleagris, michailovskyi, pallidiflora, persica, pontica, pudica, pyrenaica, raddeana, and tubiformis , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Fuchsia magellanica , Surface sow at Max. 5ºC (41ºF), germination irregular, often several months

Fumana procumbens , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Gaillardia aristata , grandiflora, lorenziana, pulchella , Sow under thin cover at 20ºC (68ºF) in light, germinates in less than two wks

Galanthus elwesii, graecus, nivalis, and plicatus , Sow  in moist sand at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for prolongued germination  

Galega officinalis , Sow at 20ºC (68ºF), germinates in about two wks thin cover, needs light

Galium boreale, mollugo, obtusum, and tinctorium , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Galium odoratum, and verum , Sow at 20ºC (68ºF), germinates in about two wks

Galtonia candicans , Sow at 20ºC (68ºF), germination slow

Galtonia viridiflora ,  Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Gaultheria depressa, miqueliana, and procumbens , Sow at Max. 5ºC (41ºF), germ. irregular, often several months

Gaultheria shallon , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Gaura lindheimeri , Sow at 20ºC (68ºF), germination slow

Gazania linearis , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Genista carinalis, and sagittalis , Scarify seed, Sow at 20ºC (68ºF), germinates in about two wks

Genista tinctoria , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Gentiana acaulis, andrewsii, angustifolia, asclepiadea, bavarica, brachyphylla, calycosa, clusii, crinita, dinarica, freyniana, frigida, froelichii, x hexaferreri, kochiana, lutea, makinoi, nivalis, pannonica, paradoxa, parryi, pneumonanthe, punctata, puberula, purpurea, quinguefolia, septemfida, sino-ornata, triflora, and verna  , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination cover thin

Gentiana algida, cruciata, dahurica, divisa, flavida, gracilipes, kurroo, oliveri, saxosa, straminea, thianscanica, and tibetica , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks cover thin

Geranium asphodeloides, caespitosum, himalayense, oxonianum, and palmatum, Sow at 13ºC (55ºF), germinates in less than two wks

Geranium endressii, macrorrhizum, and sylvaticum , Sow at 20ºC (68ºF), germination slow

Geranium pratense, and pyrenaicum , Sow at 18-22ºC (64-71ºF), if no germination after 4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, then move to 5-12ºC (41-53ºF) for germination

Geranium bohemicum, maculatum, nepalense, nodosum, palustre, phaeum, psilostemon, renardii, sanguineum, swatense, and viscosissimum , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Gerardia aspera, gattingera, and tenuifolia , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Geum chiloense , hybridum, and macrophyllum , Sow at 20ºC (68ºF), germinates in less than two wks

Geum coccineum, montanum, pyrenaicum, and reptans , Sow at Max. 5ºC (41ºF), germ. irregular, often several mos.

Geum bulgaricum, rivale, triflorum, and urbanum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Gillenia stipulata, and trifoliata , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Gladiolus illyricus, imbricatus, italicus, and palustris ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Glaucidium palmatum , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination 2 cold periods often required

Glaucium corniculatum, and flavum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Glaucium vitellianum , Sow at 20ºC (68ºF), germinates in less than two wks

Globularia cordifolia , nudicaulis, punctata, and trichosantha, Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Glyceria maxima, and striata , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Glycyrrhiza echinata, and glabra , Sow at 20ºC (68ºF), germination slow

Goniolimon tataricum (syn. Limonium tatarica) , Sow at 20ºC (68ºF), germinates in less than two wks

Gratiola officinalis , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Grindelia integrifolia, and robusta , Sow at 20ºC (68ºF), germination slow

Gundelia tournefortii , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Gunnera manicata, scabra, and tinctoria , Sow at 24-30ºC (75-86ºF), germination in about 2 weeks

Gypsophila pacifica, paniculata, repens, and tenuifolia gracilipes , Sow at 20ºC (68ºF), germination slow

Gypsophila cerastioides, Sow at Max. 5ºC (41ºF), germination irregular, often several months

Haberlea rhodopensis , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks Small seed - do not cover

Haastia pulvinaris, and sinclairii , Sow at 20ºC (68ºF), germination slow Best if sown immediately after harvest

Haberlea rhodopensis , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks Small seed - do not cover

Hebe raoulii , Sow at 20ºC (68ºF), germination slow

Hedysarum alpinum, boreale, coronarium, and hedysaroides , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Helenium autumnale , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Helenium hoopesii , Sow at 20ºC (68ºF), germination slow

Helianthella quinquenervis ,  Sow at Max. 5ºC (41ºF), germination irregular, often several months

Helianthemum apenninumm, nummularium, and oelandica, Sow at Max. 5ºC (41ºF), germination irregular, often several months

Helianthemum bicknelli, and canadense , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germ.

Helianthemum nummularium mutabile, Sow at 20ºC (68ºF), germinates in less than two wks

Helianthus angustifolius, decapetalus, maximiliana, occidentalis, and rigidus , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Helianthus grosseserratus, lactiflorus, mollis, and strumosus , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Helichrysum arenarium, bellidioides, italicum, plicatum, and thianshankum , Sow at 20ºC (68ºF) in light, germinates in less than two wks

Helictotrichon sempervirens ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination Best is sown right after harvest

Heliopsis helianthoides (syn. H. scabra) , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Helleborus argutifolius, croaticus, dyclophyllus, dumetorum, foetidus, lividus, multifidus, niger, odorus, orientalis, purpurescens, vesicarius, viridis, and x sternii   , Pour hot water over seeds, let soak 1-3 days until swelling noticeable. Sow at 22ºC (71ºF) for 6 wks or more. Move to -4 to +4ºC (24-39ºF) for 6-8 wks. Then raise the temperature to 10ºC (50ºF). If no germination in 4-6 wks, repeat the cycle from the beginning. If the warm/cold cycles were not long enough, a new warm/cold cycle is needed. short viable.

Hemerocallis hybrids, liliasphodelus, middendorffii, and minor , Sow under very thin cover at Max. 5ºC (41ºF) in light, germination irregular, often several months Not true to type

Hepatica nobilis , Sow immediately outdoors. Short viability seed will germinate in the spring.

Hepatica triloba , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Heracleum lanatum, and mantegazzianum ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination 2 cold periods often required

Herniaria glabra , Surface sow at 20ºC (68ºF) in light, germinates in less than two wks

Hesperis lutea, and matronalis , Sow at 22-24ºC (71-75ºF), germination slow Cover thin. Needs light.

Heuchera americana , x brizoides, nicratum, pulchella, versicola, and villosa v. macrorrhiza, Surface sow at 20ºC (68ºF) in light, germination slow

Heuchera cylindrica ,  Surface sow at 20ºC (68ºF) in light, if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Heuchera micrantha, and sanguinea , Surface sow at 20ºC (68ºF) in light, germinates in less than two wks

Heuchera richardsonii (hispida) , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Hibiscus coccineus, manihot, and moscheutos, and syriacus, Sow at 22-24ºC (71-75ºF), germ. in less than 2 weeks

Hieracium alpinum, aurantiacum, bombycinum, chondrillifolium, intybaceum, lanatum, pilocella, and umbellatum, Sow at 20ºC (68ºF), germinates in less than two wks

Hieracium longipilum, maculatum, and villosum, Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Hierochloe odorata , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Horminum pyrenaicum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Hosta elata, minor, montana, sieboldiana, and ventricosa , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks, recycle 

Houstonia caerulae , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Hugueninia tanacetifolia , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Humulus lupulus , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Hutchinsia alpina , Sow at 20ºC (68ºF), germination slow

Hylomecon japonicum ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Hymenoxys acaulis, and grandiflora , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Hymenoxys hoopesii ,  Sow at 20ºC (68ºF) in light, germination slow

Hypericum ascyron , calycinum, and reptans, Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Hypericum androsaemum, cerastoides, coris, olympicum, orientale, patulum, perforatum, and tetrapterum, Sow at 20ºC (68ºF), germination slow

Hypericum hyssopifolium, polyphyllum, proliferum, and pulchrum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Hypochoeris uniflora , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Hypoxis hirsuta , Sow at 20ºC (68ºF), germinates in less than two wks

Hyssopus officinalis , Sow at 20ºC (68ºF), germinates in less than two wks

Hystrix patula ,  Sow at 20ºC (68ºF), germination slow

Iberis gibraltarica, and sempervirens , Sow at 20ºC (68ºF), germinates in less than two wks needs light. Cover thin.

Iberis aurosica, and saxatilis , Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Iliamna remota, and rivularis ,  Sow at Max. 5ºC (41ºF), germination irregular, often several months, but if you have the patience to nick the small seed, sow at room temperature for germination in about 3 days.

Incarvillea cheron, chinensis, delavayi, emodii, mairie, and olgae , Sow at 20ºC (68ºF), germ. in less than two wks

Inula acaulis, candida, ensifolia, helenium, hirta, magnifica, orientalis, racemosa, and rhizocephala , Sow at 20ºC (68ºF), germination slow

Iris barbata, bucharica, bulleyana, chamaeiris, chrysographes, foetidissima, forrestii, graminea, hollandica, illyrica, kamaonensis, kaempferi, lactea, laevigata, magnifica, missouriensis, orientalis, paradoxa, pseudacorus, pseudocaucasica, pumila, reichenbachii, sanguinea, sari, setosa, sibirica, sintenisii, spuria, tectorum, tenax, variegata, versicolor, virginica, and xiphioides , Impervious seed coats. Shake in dry sharp sand or nick carefully with a file. Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Isatis glauca, and tinctoria , Sow at 20ºC (68ºF), germination slow

Isopyrum thalictroides , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination Best if sown immediately after harvest

Jankaea heldreichii , Surface sow at 20ºC (68ºF) in light, if no germ. in 3-4 wks, move to +4ºC (39ºF) for 2-4 wks

Jasione laevis, and montana , Sow at 20ºC (68ºF), germinates in about two wks

Jovibarba heuffelii , Sow at 20ºC (68ºF) in light, if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Juncus effusus, and inflexus , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Juncus ensilfolius, and filiformis , Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to +4ºC (39ºF) for 2-4 wks

Jurinea cyanoides, and mollis , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Kalimeris incisa , Sow at 20ºC (68ºF), germinates in less than two wks

Kirengeshoma palmata , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Kitabela vitifolia , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Knautia arvensis, and macedonica , Sow at Max. 5ºC (41ºF), germination irregular, often several months s

Kniphofia citrina, hybrids, and uvaria , Sow at 20ºC (68ºF), if no germination in 2 wks, move to -4 to +4ºC (24-39ºF) indefinitely.

Koeleria cristata, and glauca , Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Kosteletzkya virginica , Sow at 23ºC (73ºF), germinates in about two wks

Krigia biflora , and virginica, Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Kuhnia eupatorioides , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Lamiastrum galeobdolon ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 months, move to 5-12ºC (41-53ºF) for germination

Lamium maculatum, and purpureum , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Lantana camara , Sow under thin cover at 20ºC (68ºF) in light, germinates in about two wks

Lapeirousia laxa (syn. Anomatheca laxa) , Sow at 20ºC (68ºF), germinates in less than two wks

Laserpitium gallicum, halleri, latifolium, and siler , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Lathyrus grandiflorus, laevigatus, latifolius, palustris, venosus, and vernus , Pour hot water over seeds, let soak 1-3 days until swelling noticeable. Sow at 20ºC (68ºF) for germination in more than two weeks.

Lathyrus gmelinii , Scarify seed, sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Lathyrus niger , Scarify seed, sow at Max. 5ºC (41ºF), germination irregular, often several months

Lavandula angustifolia , laciniata, latifolia, and stoechas, Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Lavandula lanata ,  Sow at -4 to +4ºC (24-39ºF) for 6 wks, move to 18ºC (65ºF) for germ. in 1 to 3 months

Lavatera arborea , Sow at +4ºC (39ºF) for germ. in about 5 wks

Lavatera cachemiriana, and thuringiaca , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Leibnitzia anandria, kunzeana, and nepalensis , Sow at 20ºC (68ºF), germinates in less than two wks

Leontodon crispum, and rigens , Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Leontopodium alpinum, and palibinianum , Surface sow at 20ºC (68ºF) in light, germinates in less than two wks

Leontopodium souliei , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Leonurus cardiaca , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Leonurus marrubiastrum , Sow at 20ºC (68ºF), germinates in less than two wks

Lespedeza capitata, hirta, and leptostachya , Slow germinator - up to a year or more. Store seeds in layers of moist sand in the shade. Check seeds regularly in the spring, and sow them all as soon as radicles appear

Lespedeza thunbergii , Impervious seed coats. Shake in dry sharp sand or nick carefully with a file. Sow at 20ºC (68ºF), germinates in less than 2 weeks

Leucanthemum graminifolium, and x superbum ,  Sow at 20ºC (68ºF) in light, germinates in less than two wks

Leucogenes grandiceps , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Leucojum aestivum, and vernum , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Leuzea rhapontica , Sow at 20ºC (68ºF), germination slow

Levisticum officinalis , Sow at 20ºC (68ºF), germinates in less than two wks

Lewisia brachycalyx, columbiana, cotyledon, longipetala, nevadensis, oppositifolia, pygmaea,  rediviva, sierrae, and tweedyi , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for irregular germination

Leycesteria formosa , Sow at 20ºC (68ºF), germination slow

Liatris aspera, cylindracea, ligulistylis, punctata, pycnoshachya, scariola nieu , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination many empty seeds

Liatris earlei, elegans, graminifolia, scariosa, spicata, and squarrosa , Sow at 20ºC (68ºF), germination slow

Liatris mucronata , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to 4ºC (40ºF) for 12 wks, move to 5-12ºC (41-53ºF) for germination many empty seeds

Libertia formosa, and ixioides , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Libertia grandiflora , Sow at 23ºC (73ºF), germinates in about two wks

Ligularia hybrids , Sow at 20ºC (68ºF), germination rapid if you get good seed, look for fat ones. poorly filled out seeds will not germinate

Ligularia clivorum, dentata, fischeri, macrophylla, przewalskii, sibirica, stenocephala, veitchiana, and wilsoniana , Sow at 20ºC (68ºF), germination slow

Lilium bulbiferum, candidum, carniolicum, columbianum, and wilmottiae ,  Sow at 20ºC (68ºF), germination slow

Lilium formosanum, and pumilum , Sow at 10ºC (50ºF), germinates in less than two wks

Lilium martagon, oxypetalum v. insigne, pyrenaicum, and regale , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Lilium michiganense, and philadelphicum v. endinum , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Lilium philippinense , Sow at 18-22ºC (64-71ºF) for 4 wks, move to -4 to +4ºC (24-39ºF) for 4 wks, move to 5-12ºC (41-53ºF) for germination, protect young bulbs from chipmunks

Limonium gougetianum, latifolium, perezii, sinensis, and tataricum , Sow at 20ºC (68ºF), germ. in less than two wks

Limonium bellidifolium , Sow at 20ºC (68ºF), germination slow

Limonium gmelinii , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 4 wks

Linanthus nuttallii , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Linaria aerugina, alpina, and purpurea , Sow at 20ºC (68ºF), germinates in less than two wks

Linaria vulgaris, Sow at Max. 5ºC (41ºF), germination irregular, often several months

Linaria genistifolia, and supina , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Lindelofia longiflora , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Linum alpinum, flavum, and perenne , Sow at 20ºC (68ºF), germinates in less than two wks

Linum capitatum, dolomiticum, and narbonense , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Liriope muscari , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Lithospermum canescens, croceum, and incisum , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Lithospermum caroliniense, and purpureo-caeruleum, Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Loasa sp. , Sow at 20ºC (68ºF), germinates in less than two wks

Lobelia cardinalis, fulgens, x gerardii, sessilifolia, speciosa, and siphilitica , Surface sow at 22-24ºC (71-75ºF) in light, germination in less than 2 weeks

Lobelia spicata , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Loiseleuria procumbens , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Lopezia racemosa , Sow at 20ºC (68ºF), germinates in less than two wks needs winter protection

Lotus corniculatus , Sow at 20ºC (68ºF), germinates in less than two wks

Ludwigia alternatifolia, and hexapetala , Sow at 4ºC (40ºF) for 6 wks, move to 20ºC (68ºF) for germination

Lunaria biennis , Sow at 20ºC (68ºF), germinates in less than two wks thin cover, needs light, biennial

Lunaria rediviva , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Lupinus arboreus, littoralis, podophyllus, polyphyllus, russel hybrids, sericeus, and texensis , Pour hot water over seeds, let soak 1-3 days until swelling noticeable. Sow at 20ºC (68ºF) for germination in more than two weeks.

Lupinus lepidus, perennis , Pour hot water over seeds, let soak 1-3 days until swelling noticeable. Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 12 wks, then return to 20ºC (68ºF) for germination

Luzula nivea, and sylvatica ,  Sow at 20ºC (68ºF), if no germ. in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 4 wks

Luzula alpinopilosa , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Luzula luzuloides, and ulophylla , Surface sow at 20ºC (68ºF), germination slow

Lycene teunifolium , Sow at 20ºC (68ºF), germinates in less than two wks

Lychnis alpina, x arkwrightii, chalcedonica, coronaria, flos-cuculi, flos-jovis, x haageana, migueliana, viscaria, and yunnanensis, Sow at 20ºC (68ºF), germinates in less than two wks

Lychnis sieboldii , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 4 wks

Lycopus virginicus , Sow at 4ºC (40ºF) for 6 wks, move to 20ºC (68ºF) for germination

Lysimachia atropurpurea , and ciliata , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Lysimachia barystachys , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Lysimachia clethroides, ephemerum, and punctatum, Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Lysimachia lanceolata, and quadriflora , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germ.

Lysimachia lichiangensis , and minoricensis, Sow at 20ºC (68ºF), germinates in about two wks

Lythrum alatum, and anceps , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Lythrum salicaria , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks can be invasive. Illegal to sell in some states in the US

Macleaya cordata , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Madia elegans , Sow at 4ºC (40ºF) for 6 wks, move to 20ºC (68ºF) for germination

Maianthemum bifolium , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Malva alcea, and moschata, Sow at Max. 5ºC (41ºF), germination irregular, often several months

Malva arbourea , neglecta, and sylvestris, Sow at 20ºC (68ºF) in light, germinates in less than two wks

Mandragora autumnalis, and officinarum , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Marrubium cyllenium, friwaldskyanum, incanum, and suppinum, Sow at 20ºC (68ºF), germ. in less than two wks

Marrubium vulgare , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Marshalia trinervia , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Mazus reptans ,  Surface sow at 20ºC (68ºF), germination slow

Meconopsis aculeata, x beamishii, betonicifolia, cambrica, dhwojii, grandis, horridula, integrifolia, napaulensis, lancifolia, regia, x sheldonii, and villosa , Germinates in low temperatures; 5 to 15ºC (41 to 59ºF) Meconopsis germ. quicker in a peat-based soilless compost

Meconopsis punicea, and quintuliplinervia , Sow immediately outdoors. Short viability seed will germinate in the spring. Short viable.

Medicago sativa , Sow at 20ºC (68ºF), germinates in less than two wks

Megacarpaea polyandra , Sow at 20ºC (68ºF), germinates in less than two wks

Melica ciliata , Dry store seeds for 6 months, then sow at 20ºC (68ºF), germinates in about two wks

Melica altissima, nutans, transsilvanica, and uniflora , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Melissa officianalis , Sow at 20ºC (68ºF), germinates in less than two wks

Melittis melissophyllum ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Mentha aquatica, and longifolia , Sow at 20ºC (68ºF), germination slow

Mertensia maritima , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Mertensia primuloides , Sow at 20ºC (68ºF), germinates in less than two wks

Meum athamanticum , Sow immediately outdoors. Short viability seed will germinate in the spring.

Micromeria thymifolia , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Milium effusum ,  Sow at 20ºC (68ºF), germination slow

Mimulus cardinalis, cupreus, guttatus, lewisii, luteus, minima, and tilingii, Surface sow at 20ºC (68ºF) in light, germinates in less than two wks

Mimulus ringens , Surface sow at  Max. 5ºC (41ºF), germination irregular, often several months

Minuartia capilacea, laricifolia, and verna , Surface sow at 20ºC (68ºF) in light, if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Mitella pentandra , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination do not cover

Miscanthus sinensis, and transmorrisonensis , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Molinia arundinacea, and caerulea , Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Moltkia petraea , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Monarda astromontana, bradburiana, didyma, x hybrida, and punctata , Sow at 20ºC (68ºF), germ. in less than two wks thin cover, needs light

Monarda citriodora, and fistulosa , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Monardella odoratissima ,  Sow at Max. 5ºC (41ºF), germination irregular, often several months

Montia sibirica , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Morina longifolia , Sow at 20ºC (68ºF), germinates in less than two wks

Morina persica , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks  

Muhlenbergia axillaris, cuspidata, glomerata, and racemosa , Sow at -4 to +4ºC (24-39ºF) for 12 wks, move to 20ºC (68ºF) for germination

Muhlenbergia mexicana , Sow at 20ºC (68ºF), germination slow

Muscari comosum ,  Sow at Max. 5ºC (41ºF), germination irregular, often several months

Mutisia ilicifolia, and latifolia ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to +4ºC (39ºF) for 12 wks, move to 10 to 12ºC (50 - 53ºF) for germination

Myosotidium hortensia , Sow at Max. 5ºC (41ºF), germ. irregular, often several months Best if sown right after harvest

Myosotis alpestris, palustris, and sylvatica , Sow at 20ºC (68ºF), germ. in less than two wks thin cover, needs light

Myosotis australis , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Myosotis pulvinaris , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Myrrhis odorata , Sow immediately outdoors. Short viability seed will germinate in the spring.

Narcissus poeticus ,  Sow at 18-22ºC (64-71ºF) for 2-4 wks, move to -4 to +4ºC (24-39ºF) for 4-6 wks, move to 5-12ºC (41-53ºF) for germination

Narcissus serotinus , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Narthecium assifragum , Sow at 22ºC (72ºF) in muddy compost for 2-4 wks, move to 0ºC (32ºF) for 4-6 wks, after which temperature should be raised gradually.

Nepeta cataria , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks cover, needs darkness

Nepeta clarkei , dirphya, x faassenii, mussinii, nervosa, nuda, and teydea, Sow at 20ºC (68ºF), germinates in less than two wks cover, needs darkness

Nepeta sibirica, stewartiana, and subsessilis , Sow at 20ºC (68ºF), germination slow

Nerium oleander ,  Sow at 23ºC (73ºF), germination in about two wks

Nomocharis farreri, and saluenensis , Sow at Max. 5ºC (41ºF), germination irregular, often several months

Nonea pulla , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks

Notothlaspi rosulatum , Sow at 20ºC (68ºF), if no germination in 3-4 wks, move to -4 to +4ºC (24-39ºF) for 2-4 wks


Jump to alpha letter: |  A to C  |  D  |  E  |  F  |  G  |  H  |  I  |  J  |  K  |  L  |  M  |  N  |  O to Z  |

Return to Index