Deno’s Garden

Amsonia tomentosa

Genus Amsonia

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

Start around April 1, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 4 days to germinate.

100% germination in 2–4 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Amsonia p. 19Public domain
Show the original text
Amsonia (Apocyanaceae). A. tomentosa germ. 70D(5/5 in 2-4 d) and 40(2/5 in 2-6 w)-70D(3/5 on 2nd d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Amsonia p. 19. 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 Moderate Rated by us, not by the source.

Start around October 5, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    2/5 germinated in this phase.

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

about 6 months from start to sowing. Then 2 days to germinate.

60% germination in 2 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Amsonia p. 19Public domain
Show the original text
Amsonia (Apocyanaceae). A. tomentosa germ. 70D(5/5 in 2-4 d) and 40(2/5 in 2-6 w)-70D(3/5 on 2nd d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Amsonia p. 19. 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.