When to plant Zucchini in Zone 3b
In Zone 3b, Zucchini: direct sow outdoors around May 20–Jun 10. Expect to harvest around Jul 9–Jul 30.
| Step | When |
|---|---|
| Direct sow outdoors | May 20 – Jun 10 |
| Harvest | Jul 9 – Jul 30 |
Tip: Fast and prolific. A couple of plants feed a household — don't over-plant.
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 →