Synthyris pinnatifida

Difficulty High Rated by us, not by the source.

Start around July 30, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 29, 2026.

1. 1

   Warm moist stratification

   Duration: 90 days · Temperature: 70°F 21°C

   3 germinated in this phase.

2. 2

   Cold moist stratification

   Duration: 90 days · Temperature: 40°F 4°C

3. 3

   Warm moist stratification

   Duration: 90 days · Temperature: 70°F 21°C

   6 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 70 days to germinate.

17% germination in 35–70 days.

Difficulty High Rated by us, not by the source.

Start around April 7, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on April 6, 2026.

1. 1

   Cold moist stratification

   Duration: 90 days · Temperature: 40°F 4°C

   8 germinated in this phase.

2. 2

   Warm moist stratification

   Duration: 90 days · Temperature: 70°F 21°C

   5 germinated in this phase.

3. 3

   Cold moist stratification

   Duration: 90 days · Temperature: 40°F 4°C

4. 4

   Warm moist stratification

   Duration: 90 days · Temperature: 70°F 21°C

about 12 months from start to sowing. Then 4 days to germinate.

11% germination in 4 days.