When to plant napa cabbage in Idaho
Idaho spans USDA zones 5a–7a, so the right time to plant napa cabbage shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 23 in Lewiston to May 3 in Garden City — below are local dates for 25 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Boise City | 7a | April 24 | October 21 | April 10 – April 24 |
| Meridian | 7a | April 24 | October 21 | April 10 – April 24 |
| Nampa | 7a | April 29 | October 13 | April 15 – April 29 |
| Idaho Falls | 5b | May 9 | October 1 | April 25 – May 9 |
| Caldwell | 7a | April 29 | October 13 | April 15 – April 29 |
| Pocatello | 6a | May 2 | October 11 | April 18 – May 2 |
| Coeur d'Alene | 6b | April 22 | October 18 | April 8 – April 22 |
| Twin Falls | 7a | April 30 | October 9 | April 16 – April 30 |
Napa Cabbage in Idaho: FAQ
When can I plant napa cabbage in Idaho?
Across Idaho, the time to transplant napa cabbage spans roughly March 23 in Lewiston to May 3 in Garden City, each following that city's local frost dates.
Does the napa cabbage planting date vary across Idaho?
Yes. Idaho publishes 25 cities with their own frost dates, so the right napa cabbage 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 napa cabbage take to grow in Idaho?
Napa Cabbage takes about 70–85 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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