When to plant cowpea (southern pea) in New Hampshire
New Hampshire spans USDA zones 5a–6a, so the right time to plant cowpea (southern pea) shifts by weeks across the state. The window to sow seed directly outdoors runs from about May 13 in Nashua to May 28 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 | May 14 – May 28 |
| Nashua | 6a | April 29 | October 8 | May 13 – May 27 |
| Concord | 5b | May 8 | October 3 | May 22 – June 5 |
| Dover | 6a | May 3 | October 10 | May 17 – May 31 |
| Rochester | 6a | April 30 | October 9 | May 14 – May 28 |
| Keene | 5b | May 14 | October 1 | May 28 – June 11 |
| Portsmouth | 6a | May 4 | October 8 | May 18 – June 1 |
| Derry | 6a | April 30 | October 11 | May 14 – May 28 |
Cowpea (Southern Pea) in New Hampshire: FAQ
When can I plant cowpea (southern pea) in New Hampshire?
Across New Hampshire, the time to direct-sow cowpea (southern pea) spans roughly May 13 in Nashua to May 28 in Keene, each following that city's local frost dates.
Does the cowpea (southern pea) planting date vary across New Hampshire?
Yes. New Hampshire publishes 15 cities with their own frost dates, so the right cowpea (southern pea) 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 cowpea (southern pea) take to grow in New Hampshire?
Cowpea (Southern Pea) takes about 60–90 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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