Deno’s Garden

Primula violacea

Genus Primula

Protocol

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    5 germinated in this phase.

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 9 months from start to sowing. Then 8 days to germinate.

87% germination in 6–8 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Primula p. 197Public domain
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Primula. (Primulaceae). The discovery of a photorequirement in P. violacea (Mus) germ. 70(5%)-40-70(87% in 6-8 d).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Primula p. 197. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.