4a When to plant broccoli in zone 4a
Zone 4a median last spring freeze: May 15 · first fall freeze: Sep 24 · harvest in ~60-90 days.
| Step | Zone 4a dates | Note |
|---|---|---|
| Start seeds indoors | Apr 10 – Apr 24 | 6–10 weeks before transplanting |
| Transplant outside | May 29 | after last spring freeze |
| Direct sow (spring) | Apr 24 | before last spring freeze |
| Fall planting | Jul 23 | before first fall freeze |
How broccoli grow in zone 4a
Transplant — start indoors or buy seedlings. Half-hardy — tolerates light frost. Harvest runs roughly 60-90 days after planting. These windows come from extension planting tables anchored to zone 4a's median freeze dates — for varieties and local conditions, check with your local extension office.
Next: the full zone 4a calendar · other crops in zone 4a: tomatoes · peppers · cucumbers · zucchini & summer squash · winter squash & pumpkins · snap beans · sweet corn · peas · lettuce · 5 more