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When to plant swiss chard in Zone 6a
In Zone 6a, direct-sow or transplant around April 9 – April 23. For a fall crop, sow around July 26 – August 9.
Your swiss chard timeline — Zone 6a
| Start indoors | March 5 – March 12 |
|---|---|
| Transplant | April 9 – April 23 |
| Sow for fall | July 26 – August 9 |
| Zone 6a last frost | ~04/30 |
| Zone 6a first frost | ~10/15 |
Start indoors or direct-sow; set out / sow 2 weeks before the last frost. [src]Cited: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”
Dates computed from Zone 6a'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).