When to plant Spinach in Zone 3b
In Zone 3b, Spinach: direct sow outdoors around Apr 8–May 6; direct sow outdoors around Jul 18–Aug 8. Expect to harvest around May 18–Jun 15.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 8 – May 6 |
| Direct sow outdoors | Jul 18 – Aug 8 |
| Harvest | May 18 – Jun 15 |
| Harvest | Aug 27 – Sep 17 |
Tip: Very cold-hardy; sow as soon as soil can be worked, and again in fall. Bolts in heat.
Zone 3b averages a last spring frost around May 20 and a first fall frost around Sep 12. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3b calendar in the tool →