How long does tomato seeds take to sprout? (with a heat mat)
Short answer
5-7 days
Bottom heat speeds tomato germination.
What changes the time
| Condition | Time | Why |
|---|---|---|
| in cool soil | up to 14 days | Below ~21C germination slows a lot. |
| with a heat mat | 5-7 days | Bottom heat speeds tomato germination. |
Tips
- Keep soil ~24C and lightly moist for best results.
FAQ
Why are not my tomato seeds sprouting?
Usually soil that is too cold or too dry.