Deno’s Garden

Streptopus roseus

Genus Streptopus

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around July 2, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 1, 2026.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

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

33% germination in 8 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Streptopus p. 63Public domain
Show the original text
Streptopus (Liliaceae). S. rosea data is now more complete. Seeds germ. 70D-40-70D(2/6 on 8th d) and 40-70D(1/4 in 3rd w)-40-70D(1/4 on 7th d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Streptopus p. 63. 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, 1998

Difficulty High Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

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

    1/4 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 21 days to germinate.

25% germination in 21 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Streptopus p. 63Public domain
Show the original text
Streptopus (Liliaceae). S. rosea data is now more complete. Seeds germ. 70D-40-70D(2/6 on 8th d) and 40-70D(1/4 in 3rd w)-40-70D(1/4 on 7th d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Streptopus p. 63. 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.