When to plant brussels sprouts in Idaho
Idaho spans USDA zones 5a–7a, so the right time to plant brussels sprouts shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 6 in Lewiston to May 17 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 24 – May 8 |
| Meridian | 7a | April 24 | October 21 | April 24 – May 8 |
| Nampa | 7a | April 29 | October 13 | April 29 – May 13 |
| Idaho Falls | 5b | May 9 | October 1 | May 9 – May 23 |
| Caldwell | 7a | April 29 | October 13 | April 29 – May 13 |
| Pocatello | 6a | May 2 | October 11 | May 2 – May 16 |
| Coeur d'Alene | 6b | April 22 | October 18 | April 22 – May 6 |
| Twin Falls | 7a | April 30 | October 9 | April 30 – May 14 |
Brussels Sprouts in Idaho: FAQ
When can I plant brussels sprouts in Idaho?
Across Idaho, the time to transplant brussels sprouts spans roughly April 6 in Lewiston to May 17 in Garden City, each following that city's local frost dates.
Does the brussels sprouts planting date vary across Idaho?
Yes. Idaho publishes 25 cities with their own frost dates, so the right brussels sprouts 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 brussels sprouts take to grow in Idaho?
Brussels Sprouts takes about 90–110 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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