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When to plant radishes in Zone 5b
Your radishes timeline — Zone 5b
| Direct-sow | April 6 – April 20 |
|---|---|
| Sow for fall | August 18 – September 1 |
| Zone 5b last frost | ~05/04 |
| Zone 5b first frost | ~10/08 |
Dates computed from Zone 5b'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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Calendar computed 2026-09-28. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”; University of Georgia Extension — Vegetable Planting Chart (Circular C963) (days to maturity).