4b When to plant broccoli in zone 4b
Zone 4b median last spring freeze: May 12 · first fall freeze: Sep 27 · harvest in ~60-90 days.
| Step | Zone 4b dates | Note |
|---|---|---|
| Start seeds indoors | Apr 7 – Apr 21 | 6–10 weeks before transplanting |
| Transplant outside | May 26 | after last spring freeze |
| Direct sow (spring) | Apr 21 | before last spring freeze |
| Fall planting | Jul 26 | before first fall freeze |
How broccoli grow in zone 4b
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 4b's median freeze dates — for varieties and local conditions, check with your local extension office.
Next: the full zone 4b calendar · other crops in zone 4b: tomatoes · peppers · cucumbers · zucchini & summer squash · winter squash & pumpkins · snap beans · sweet corn · peas · lettuce · 5 more