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Seed Germination Chart

Some Abbreviations Used
A: Annual - a plant which lives one year only from seed.
P: Perennial - a plant which comes back every year.
H: Indicates a plant hardy in northern zones.
T: Indicates a tender plant, shrub (sh), or tree (t) which will not winter over in northern zones.
IS: In Situ; can be planted outside directly where it is to grow.
JC: Just Cover; barely cover with soil
SS:Surface Sow; press seeds gently into to the soil to make good contact, but do not cover with any additional soil; these seeds require light to germinate.
L/D: Light or Dark; seeds which require dark should have the flat covered with newspaper or brown paper or something similar to keep light from getting to the seeds. Plants requiring light to germinate are to be surface sown.
S/I: Germination is slow and irregular
HH: Half hardy. If an annual, it will usually not reseed itself in northern zones, and if perennial, will be killed by freezing temperatures.
TP: Tender perennial (or shrub, etc). Will not winter over in northern zones, but makes a good greenhouse specimen.
GHS: Tropical or delicate plant best grown in greenhouse.
BB: Bulb.

NOTE: The heading 'Medium' refers to a sterile potting soil.

PlantDays for
Temp °FMediumDepth of
Special Info
Daboecia (hsh)30-120 s/iL55-65Acid peat SSDo not allow compost to dry out.
Dahlia (hha)5-20.65-70Peaty 1/16"Do not allow compost to dry out.
Daphne (hsh)150-365 s/iL50-60Well-drained SS#4; 2 months at 70ºF, then 3 months cold.
Darlingtonia (hp)30-90 s/i.75-80Peaty SSDo not allow to dry out. See Begonia
Datura (hhsh)21-42.55-65Well-drained 1/8".
Davidia (ht)300-365 s/i.50-65Peaty ¼"#4; warm, moist for 3 to 4 months, then 3 to 4 months cold.
Decaisnea (hsh)30-180 s/i.55-60Well-drained ¼".
Delonix (tt)30-90 s/i.75-85Peaty 1/16"#2 for 24 hours.
Delosperma (hhp)10-40L75Well-drained SS.
Delphinium (hp)14-28 s/iD50-55Peaty 1/16"#3 for 2 weeks. Watch temp. High temp causes dormancy.
Desmodium (ta)30-90.75-80Well-drained 1/16".
Dianella (hhp)30-90.65-70Well-drained 1/16".
Dianthus (hha/hp)14-21.60-70Well-drained JC.
Diascia (hha)14-30.60Well-drained JC.
Dicentra (hp)30-180 s/iL55-60Well-drained JC#3 for 6 weeks.
Dichorisandra (tp)7-60.70-75Peaty JC.
Dictamnus (hp)30-180 s/i.55-60Well-drained 1/16"#3 for 4 to 8 weeks.
Didymocarpus (tp)14-55 s/iL65-70Well-drained SS.
Dierama (hp)30-180 s/iL60-65Well-drained SSSee Begonia
Dietes (hhp)30-90 s/i.50-60Well-drained JC.
Digitalis (hp,hb)15-20L60-65Peaty SSCan be sown IS.
Dimorphotheca (hha)10-15L60-70Peaty JC.
Dionaea (tp)30-90 s/iL75-80Peaty SSSee Begonia
Dioon (tp)30-90 s/i.70-75½ peat, ½ sand ¼"See Banana
Dioscorea (hp)21-36.70-75Peaty 1/8".
Diplarrhena (hp)30-90.55-65Well-drained JC.
Diplolaena (tsh)30-150 s/iL70-80Peaty JC.
Dipsacus (hb)4-30.-Well-drained ¼"Best sown IS.
Dizgotheca (hhsh)20-30L70Peaty SS.
Disporum (hp)30-180+ s/iL55-65Well-drained JC#3 for 6 weeks.
Dodecatheon (hp)90-365 s/i.60-70Well-drained 1/16"See Bonsai
Dolichos (hha)14-30.70Well-drained 1/16"#2
Doronicum (hp)15-20L70Well-drained SSReduce night time temp.
Doryanthes (hhp)30-60.65Peaty JC#2 for 3 hours.
Draba (hp)30-90 s/i>.55Well-drained JC#3 and See Bonsai
Dracaena (tsh)30-180 s/iL75-85Well-drained SSKeep soil slightly moist.
Dracunculus (hp)30-180 s/i.55-65Peaty JCKeep soil slightly moist.
Drosera (tp)30-90L55-65Peaty SSSee Begonia
Dryas (hp)50-180 s/i.60-70Well-drained JCSee Bonsai
Duchesnia (hp)30-90 s/iL55-65Well-drained JC.
Duranta (tsh)30-60.70-75Peaty JC.

© 2001 by Ernestina Parziale