Deno’s Garden

Dirca palustris

Genus Dirca

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around July 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 9, 2025.

  1. Clean the flesh off the seed

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  8. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 1.5 years from start to sowing. Then 5 days to germinate.

100% germination in 5 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dirca p. 39Public domain
Show the original text
Dirca (Thymelaceae). D. palustris seed was WC for 20 minutes and the outer coat removed. This seed germ. 70L(1/8 in 11th w) and 40-70-40-40-70-40- 70(2/2 on 5th d). None germ. in OT, and all rotted in 70 GA-3. Seeds DS an additional year all rotted. The seeds were received in July, and it is suspected that they were at least a year old and had largely died already.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dirca p. 39. 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.

Protocol 2

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around January 18, 2027 for a May 3 last frost.

  1. Clean the flesh off the seed

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 77 days to germinate.

12% germination in 77 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dirca p. 39Public domain
Show the original text
Dirca (Thymelaceae). D. palustris seed was WC for 20 minutes and the outer coat removed. This seed germ. 70L(1/8 in 11th w) and 40-70-40-40-70-40- 70(2/2 on 5th d). None germ. in OT, and all rotted in 70 GA-3. Seeds DS an additional year all rotted. The seeds were received in July, and it is suspected that they were at least a year old and had largely died already.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dirca p. 39. 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.