When to plant Zucchini in Zone 4a
In Zone 4a, Zucchini: direct sow outdoors around May 15–Jun 5. Expect to harvest around Jul 4–Jul 25.
| Step | When |
|---|---|
| Direct sow outdoors | May 15 – Jun 5 |
| Harvest | Jul 4 – Jul 25 |
Tip: Fast and prolific. A couple of plants feed a household — don't over-plant.
Zone 4a averages a last spring frost around May 15 and a first fall frost around Sep 18. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4a calendar in the tool →