
Starting Seeds in Texas Heat
When to sow, how deep, and how to keep seedlings alive through a Gulf Coast summer.
Read the guide
Timing
On the Gulf Coast (zone 9a), start warm-season seed indoors in late January and set out after mid-March. Fall is your second window — sow heat-tolerant greens and herbs in September.
Sowing depth
- Tiny seed (basil, marigold): barely cover, ⅛".
- Medium (tomato, pepper): ¼".
- Large (beans, squash): 1".
Surviving the heat
Keep soil evenly moist, never soggy. Bottom-water trays to avoid damping-off. Once it's above 90°F, give afternoon shade and water early morning.


