When to plant kohlrabi in Idaho
Idaho spans USDA zones 5a–7a, so the right time to plant kohlrabi shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 9 in Lewiston to April 19 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 | March 27 – April 10 |
| Meridian | 7a | April 24 | October 21 | March 27 – April 10 |
| Nampa | 7a | April 29 | October 13 | April 1 – April 15 |
| Idaho Falls | 5b | May 9 | October 1 | April 11 – April 25 |
| Caldwell | 7a | April 29 | October 13 | April 1 – April 15 |
| Pocatello | 6a | May 2 | October 11 | April 4 – April 18 |
| Coeur d'Alene | 6b | April 22 | October 18 | March 25 – April 8 |
| Twin Falls | 7a | April 30 | October 9 | April 2 – April 16 |
Kohlrabi in Idaho: FAQ
When can I plant kohlrabi in Idaho?
Across Idaho, the time to transplant kohlrabi spans roughly March 9 in Lewiston to April 19 in Garden City, each following that city's local frost dates.
Does the kohlrabi planting date vary across Idaho?
Yes. Idaho publishes 25 cities with their own frost dates, so the right kohlrabi 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 kohlrabi take to grow in Idaho?
Kohlrabi takes about 45–60 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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