Seed-start answer
Spinach is usually direct-sown around Jan 8
This uses ZIP 85001, the Phoenix frost station, and the Feb 5 last-frost estimate.
Seed starting schedule
Spinach dates for Phoenix, AZ
| Step | Date | How to use it |
|---|---|---|
| Direct Sow | January 8, 2026 | Sow seed outside when the crop and soil can handle the window. |