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When to plant basil in Zone 6a
In Zone 6a, start indoors around March 30 and transplant around May 4 – May 18.
Your basil timeline — Zone 6a
| Start indoors | March 30 |
|---|---|
| Transplant | May 4 – May 18 |
| Zone 6a last frost | ~04/30 |
| Zone 6a first frost | ~10/15 |
Start indoors; set out 1–2 weeks after 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”.