Deno’s Garden

Hydrastis canadensis

Genus Hydrastis

Protocol

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    1 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    1 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 18 months from start to sowing. Then 12 days to germinate.

6% germination in 8–12 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hydrastis p. 154Public domain
Show the original text
Hydrastis (Ranunculaceae). H. canadensis germ. 40-70(1%)-40-70(1%)- 40-70(6% in 8-12 d) and none in six cycles staling at 70. Seed DS 6 m at 70 or 40 all rotted. The seedlings from the last germination opened their cotyledons, but did not appear to be vigorous. After the 2 y of alternating cycles the samples were placed outdoors on January 1, and 3-10% germ. the following April. Outdoor experiments need to be conducted on fresh seed.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hydrastis p. 154. 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.