Deno’s Garden

Erythronium sibiricum

Genus Erythronium

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around May 15, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on May 14, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    10 germinated in this phase.

Steps after step 3 run on after germination.

about 9 months from start to sowing. Then 56 days to germinate.

60% germination in 42–56 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Erythronium p. 140Public domain
Show the original text
Erythronium (Liliaceae). E. sibiricum germ. 70-40(60% in 8th w) and 40-70-40(60% in 6-8 w)-70(10% on 4th d). The radicles develop slowly at 40 and the cotyledon did not expand until the shift to 70 after 3 m at 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Erythronium p. 140. 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, 1993

Difficulty Moderate Rated by us, not by the source.

Start around August 13, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 12, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 6 months from start to sowing. Then 56 days to germinate.

60% germination in 56 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Erythronium p. 140Public domain
Show the original text
Erythronium (Liliaceae). E. sibiricum germ. 70-40(60% in 8th w) and 40-70-40(60% in 6-8 w)-70(10% on 4th d). The radicles develop slowly at 40 and the cotyledon did not expand until the shift to 70 after 3 m at 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Erythronium p. 140. 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.