When to plant Zucchini in Zone 4b
In Zone 4b, Zucchini: direct sow outdoors around May 10–May 31. Expect to harvest around Jun 29–Jul 20.
| Step | When |
|---|---|
| Direct sow outdoors | May 10 – May 31 |
| Harvest | Jun 29 – Jul 20 |
Tip: Fast and prolific. A couple of plants feed a household — don't over-plant.
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 →