Crepis sibirica
Genus Crepis
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1996Difficulty High Rated by us, not by the source.
Start around July 5, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 4, 2026.
- 1
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C · Light: dark
20 germinated in this phase.
- 2
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
5 germinated in this phase.
- 3
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C · Light: dark
about 9 months from start to sowing. Then 5 days to germinate.
32% germination in 3–5 days.
Protocol 2
DerivedN. C. Deno, 1996Difficulty Very high Rated by us, not by the source.
Start around March 27, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 26, 2026.
- 1
Dry storage
Duration: 365 days · Temperature: 70°F 21°C
- 2
Sow and cover
Temperature: 70°F 21°C · Light: dark
about 12 months from start to sowing. Then 10 days to germinate.
3% germination in 10 days.