Seed-start answer
Spinach is usually direct-sown around Feb 1
In ZIP 78205, spinach is usually direct-sown around Feb 1 instead of started indoors.
Source: san-antonio-intl frost station, USDA zone 9a, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.
This uses ZIP 78205, the San Antonio frost station, and the Mar 1 last-frost estimate.
Seed starting schedule
Spinach dates for San Antonio, TX
| Step | Date | How to use it |
|---|---|---|
| Direct Sow | February 1, 2026 | Sow seed outside when the crop and soil can handle the window. |