4a When to plant lettuce in zone 4a
Zone 4a median last spring freeze: May 15 · first fall freeze: Sep 24 · harvest in ~45-60 days.
| Step | Zone 4a dates | Note |
|---|---|---|
| Start seeds indoors | Apr 17 – May 1 | 6–10 weeks before transplanting |
| Transplant outside | Jun 5 | after last spring freeze |
| Direct sow (spring) | Apr 17 | before last spring freeze |
| Fall planting | Aug 6 | before first fall freeze |
How lettuce grow in zone 4a
Direct sow or transplant both work. Half-hardy — tolerates light frost. Harvest runs roughly 45-60 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 · spinach · 5 more