Seed-start answer
Spinach is usually direct-sown around Mar 23
In ZIP 02108, spinach is usually direct-sown around Mar 23 instead of started indoors.
Source: boston-logan frost station, USDA zone 7a, 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 02108, the Boston frost station, and the Apr 20 last-frost estimate.
Seed starting schedule
Spinach dates for Boston, MA
| Step | Date | How to use it |
|---|---|---|
| Direct Sow | March 23, 2026 | Sow seed outside when the crop and soil can handle the window. |