When to plant Spinach in Zone 4a
In Zone 4a, Spinach: direct sow outdoors around Apr 3–May 1; direct sow outdoors around Jul 24–Aug 14. Expect to harvest around May 13–Jun 10.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 3 – May 1 |
| Direct sow outdoors | Jul 24 – Aug 14 |
| Harvest | May 13 – Jun 10 |
| Harvest | Sep 2 – Sep 23 |
Tip: Very cold-hardy; sow as soon as soil can be worked, and again in fall. Bolts in heat.
Zone 4a averages a last spring frost around May 15 and a first fall frost around Sep 18. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4a calendar in the tool →