When to plant cowpea (southern pea) in Idaho
Idaho spans USDA zones 5a–7a, 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 April 20 in Lewiston to May 31 in Garden City — below are local dates for 25 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Boise City | 7a | April 24 | October 21 | May 8 – May 22 |
| Meridian | 7a | April 24 | October 21 | May 8 – May 22 |
| Nampa | 7a | April 29 | October 13 | May 13 – May 27 |
| Idaho Falls | 5b | May 9 | October 1 | May 23 – June 6 |
| Caldwell | 7a | April 29 | October 13 | May 13 – May 27 |
| Pocatello | 6a | May 2 | October 11 | May 16 – May 30 |
| Coeur d'Alene | 6b | April 22 | October 18 | May 6 – May 20 |
| Twin Falls | 7a | April 30 | October 9 | May 14 – May 28 |
Cowpea (Southern Pea) in Idaho: FAQ
When can I plant cowpea (southern pea) in Idaho?
Across Idaho, the time to direct-sow cowpea (southern pea) spans roughly April 20 in Lewiston to May 31 in Garden City, each following that city's local frost dates.
Does the cowpea (southern pea) planting date vary across Idaho?
Yes. Idaho publishes 25 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 Idaho?
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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