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When to plant lettuce in Zone 4a
In Zone 4a, direct-sow or transplant around April 13 – April 27. For a fall crop, sow around June 13 – June 27.
Your lettuce timeline — Zone 4a
| Start indoors | March 16 – March 23 |
|---|---|
| Transplant | April 13 – April 27 |
| Sow for fall | June 13 – June 27 |
| Zone 4a last frost | ~05/14 |
| Zone 4a first frost | ~09/27 |
Start indoors or direct-sow; set out / sow 3–4 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 4a'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).