When to plant Winter Squash in Zone 3a
In Zone 3a, Winter Squash: direct sow outdoors around May 25–Jun 15. Expect to harvest around Aug 28–Sep 18.
| Step | When |
|---|---|
| Direct sow outdoors | May 25 – Jun 15 |
| Harvest | Aug 28 – Sep 18 |
Tip: Harvest when the rind is hard and can't be dented by a thumbnail, then cure for storage.
Zone 3a averages a last spring frost around May 25 and a first fall frost around Sep 8. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3a calendar in the tool →