When to plant Cauliflower in Idaho
In spring, from Mar 1 – 20 in Lewiston to May 10 – June 15 in Garden City.
In fall, from May 1 – July 1 in Rexburg to July 15 – Aug 15 in Lewiston.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Ammon | Apr 15 – May 15 | May 10 – July 15 |
| Blackfoot | Apr 10 – May 10 | May 10 – July 15 |
| Boise City | Mar 15 – Apr 20 | July 1 – Aug 5 |
| Burley | Apr 15 – May 15 | May 10 – July 15 |
| Caldwell | Apr 10 – May 10 | June 1 – July 25 |
| Chubbuck | May 10 – June 15 | May 10 – July 15 |
| Coeur d'Alene | Mar 15 – Apr 20 | July 1 – Aug 5 |
| Eagle | Apr 10 – May 10 | July 1 – Aug 5 |
| Garden City | May 10 – June 15 | June 1 – July 25 |
| Hayden | Mar 15 – Apr 20 | July 1 – Aug 5 |
| Idaho Falls | Apr 15 – May 15 | May 10 – July 15 |
| Jerome | Apr 10 – May 10 | June 1 – July 25 |
| Kuna | Mar 15 – Apr 20 | July 1 – Aug 5 |
| Lewiston | Mar 1 – 20 | July 15 – Aug 15 |
| Meridian | Mar 15 – Apr 20 | July 1 – Aug 5 |
| Middleton | Apr 10 – May 10 | June 1 – July 25 |
| Moscow | Apr 10 – May 10 | May 10 – July 15 |
| Mountain Home | Apr 10 – May 10 | June 1 – July 25 |
| Nampa | Apr 10 – May 10 | June 1 – July 25 |
| Pocatello | Apr 10 – May 10 | June 1 – July 25 |
| Post Falls | Mar 15 – Apr 20 | July 1 – Aug 5 |
| Rathdrum | Mar 15 – Apr 20 | July 1 – Aug 5 |
| Rexburg | Apr 15 – May 15 | May 1 – July 1 |
| Sandpoint | Apr 15 – May 15 | May 10 – July 15 |
| Star | Apr 10 – May 10 | June 1 – July 25 |
| Twin Falls | Apr 10 – May 10 | June 1 – July 25 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for cauliflower.