When to plant cauliflower in Idaho
Idaho spans USDA zones 5a–7a, so the right time to plant cauliflower 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 |
Cauliflower in Idaho: FAQ
When can I plant cauliflower in Idaho?
Across Idaho, the time to transplant cauliflower spans roughly March 23 in Lewiston to May 3 in Garden City, each following that city's local frost dates.
Does the cauliflower planting date vary across Idaho?
Yes. Idaho publishes 25 cities with their own frost dates, so the right cauliflower 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 cauliflower take to grow in Idaho?
Cauliflower takes about 55–80 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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