When to plant lettuce in New Hampshire
New Hampshire spans USDA zones 5a–6a, so the right time to plant lettuce shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 8 in Nashua to April 23 in Keene — below are local dates for 15 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Manchester | 6a | April 30 | October 11 | April 9 – April 30 |
| Nashua | 6a | April 29 | October 8 | April 8 – April 29 |
| Concord | 5b | May 8 | October 3 | April 17 – May 8 |
| Dover | 6a | May 3 | October 10 | April 12 – May 3 |
| Rochester | 6a | April 30 | October 9 | April 9 – April 30 |
| Keene | 5b | May 14 | October 1 | April 23 – May 14 |
| Portsmouth | 6a | May 4 | October 8 | April 13 – May 4 |
| Derry | 6a | April 30 | October 11 | April 9 – April 30 |
Lettuce in New Hampshire: FAQ
When can I plant lettuce in New Hampshire?
Across New Hampshire, the time to transplant lettuce spans roughly April 8 in Nashua to April 23 in Keene, each following that city's local frost dates.
Does the lettuce planting date vary across New Hampshire?
Yes. New Hampshire publishes 15 cities with their own frost dates, so the right lettuce planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does lettuce take to grow in New Hampshire?
Lettuce takes about 45–60 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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