When to plant Pumpkin in Zone 4b
In Zone 4b, Pumpkin: direct sow outdoors around May 10–May 31. Expect to harvest around Aug 18–Sep 8.
| Step | When |
|---|---|
| Direct sow outdoors | May 10 – May 31 |
| Harvest | Aug 18 – Sep 8 |
Tip: Needs lots of room and a long warm season. Count back from your fall frost for jack-o'-lanterns.
Zone 4b averages a last spring frost around May 10 and a first fall frost around Sep 22. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4b calendar in the tool →