Tulipa sprengeri
Genus Tulipa
This source reports three treatments. All are shown.
Protocol 1
DerivedN. C. Deno, 1996Difficulty High Rated by us, not by the source.
Start around October 20, 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
20 germinated in this phase.
- 3
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
- 4
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
2 germinated in this phase.
- 5
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
18 germinated in this phase.
Steps after step 1 run on after germination.
about 3 months from start to sowing. Then 77 days to germinate.
60% germination in 77 days.
Protocol 2
DerivedN. C. Deno, 1996Difficulty High Rated by us, not by the source.
Start around July 8, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 7, 2026.
- 1
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C · Light: dark
- 2
Cold moist stratification
Duration: 90 days · Temperature: 40°F 4°C
34 germinated in this phase.
- 3
Warm moist stratification
Duration: 90 days · Temperature: 70°F 21°C
about 9 months from start to sowing. Then 2 days to germinate.
51% germination in 2 days.
Protocol 3
DerivedN. C. Deno, 1996Difficulty Very high Rated by us, not by the source.
- 1
Sow outdoors and leave it
Nothing germinated outdoors.
No stated waiting before sowing.
0% germination.
This source doesn't state how long.