Seed-start answer
Spinach is usually direct-sown around Dec 4
In ZIP 96813, spinach is usually direct-sown around Dec 4 instead of started indoors.
Source: honolulu-intl frost station, USDA zone 12b, 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 96813, the Honolulu frost station, and the Jan 1 last-frost estimate.
Seed starting schedule
Spinach dates for Honolulu, HI
| Step | Date | How to use it |
|---|---|---|
| Direct Sow | December 4, 2025 | Sow seed outside when the crop and soil can handle the window. |