For some species (like lettuce, celery and pansy) germination at high temperatures (>25°C or 77°F) can induce thermo-dormancy.
Seeds with thermodormancy will not germinate when the temperature returns to near optimal temperatures.
Seed priming is an effective treatment to prevent thermo-dormancy.
Thermodormancy in pansy
Temperature |
Germination |
|---|---|
| 10°C | 75% |
| 15°C | 85% |
| 20°C | 90% |
| 25°C | 84% |
| 30°C | 56% |
| 35°C | 10% |
