When to plant spinach in New Hampshire
New Hampshire spans USDA zones 5a–6a, so the right time to plant spinach shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 18 in Nashua to April 2 in Keene — below are local dates for 15 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Manchester | 6a | April 30 | October 11 | March 19 – April 16 |
| Nashua | 6a | April 29 | October 8 | March 18 – April 15 |
| Concord | 5b | May 8 | October 3 | March 27 – April 24 |
| Dover | 6a | May 3 | October 10 | March 22 – April 19 |
| Rochester | 6a | April 30 | October 9 | March 19 – April 16 |
| Keene | 5b | May 14 | October 1 | April 2 – April 30 |
| Portsmouth | 6a | May 4 | October 8 | March 23 – April 20 |
| Derry | 6a | April 30 | October 11 | March 19 – April 16 |
Spinach in New Hampshire: FAQ
When can I plant spinach in New Hampshire?
Across New Hampshire, the time to direct-sow spinach spans roughly March 18 in Nashua to April 2 in Keene, each following that city's local frost dates.
Does the spinach planting date vary across New Hampshire?
Yes. New Hampshire publishes 15 cities with their own frost dates, so the right spinach 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 spinach take to grow in New Hampshire?
Spinach takes about 40–50 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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