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When to plant sweet corn in Zone 7b
In Zone 7b, direct-sow around April 6 – April 20.
Your sweet corn timeline — Zone 7b
| Direct-sow | April 6 – April 20 |
|---|---|
| Zone 7b last frost | ~04/06 |
| Zone 7b first frost | ~11/01 |
Direct-sow when soil warms to 60°F (after the last frost). [src]Cited: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”
Dates computed from Zone 7b's median NOAA frost normals and the cited rule. Your town may differ by a week or two — check your exact ZIP.
What you'll need
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Last verified 2026-07-16. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”; UGA Extension (days to maturity).