4a When to plant sweet corn in zone 4a
Zone 4a median last spring freeze: May 15 · first fall freeze: Sep 24 · harvest in ~60-100 days.
| Step | Zone 4a dates | Note |
|---|---|---|
| Direct sow (spring) | May 8 | before last spring freeze |
How sweet corn grow in zone 4a
Direct sow — these seeds go straight in the ground. Tender — damaged by any frost. Harvest runs roughly 60-100 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 · peas · lettuce · spinach · 5 more