Corydalis cheilanthifolia
Genus Corydalis
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Moderate Rated by us, not by the source.
Start around September 14, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 13, 2026.
- 1
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
2 germinated in this phase.
- 2
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
about 6 months from start to sowing. Then 24 days to germinate.
58% germination in 3–24 days.
Protocol 2
DerivedN. C. Deno, 1993Difficulty High Rated by us, not by the source.
Start around September 22, 2026 for a May 3 last frost.
- 1
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
- 2
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
- 3
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
- 4
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
Steps after step 2 run on after germination.
about 6 months from start to sowing. Then 15 days to germinate.
17% germination in 10–15 days.