In USDA zone 4, the last spring frost usually falls between May 1 and May 20. Sow or plant zucchini around Jun 3 to Jul 3. Expect to harvest around Jul 28 to Sep 15.
| Sow or plant outside | Jun 3 to Jul 3 |
|---|---|
| Harvest | Jul 28 to Sep 15 |
| Typical last spring frost | May 1 to May 20 |
| Typical first fall frost | around Sep 15 |
USDA zones measure winter cold, not frost dates, so these are typical dates for the zone. Towns in the same zone can be weeks apart.
Get dates for zucchini in your exact town, not just your zone.
Get my dates free →One plant feeds the whole street. Read the full zucchini growing guide: spacing, sun and soil, step-by-step care, problems and the best varieties.