When to plant Tomatoes in Idaho
In spring, from Apr 20 – June 1 in Lewiston to May 25 – June 15 in Garden City.
In fall, June 1 – 20.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Ammon | May 15 – June 10 | June 1 – 20 |
| Blackfoot | May 10 – June 15 | June 1 – 20 |
| Boise City | May 5 – June 10 | June 1 – July 1 |
| Burley | May 15 – June 10 | June 1 – 20 |
| Caldwell | May 10 – June 15 | June 1 – 20 |
| Chubbuck | May 25 – June 15 | June 1 – 20 |
| Coeur d'Alene | May 5 – June 10 | June 1 – July 1 |
| Eagle | May 10 – June 15 | June 1 – July 1 |
| Garden City | May 25 – June 15 | June 1 – 20 |
| Hayden | May 5 – June 10 | June 1 – July 1 |
| Idaho Falls | May 15 – June 10 | June 1 – 20 |
| Jerome | May 10 – June 15 | June 1 – 20 |
| Kuna | May 5 – June 10 | June 1 – July 1 |
| Lewiston | Apr 20 – June 1 | June 1 – July 1 |
| Meridian | May 5 – June 10 | June 1 – July 1 |
| Middleton | May 10 – June 15 | June 1 – 20 |
| Moscow | May 10 – June 15 | June 1 – 20 |
| Mountain Home | May 10 – June 15 | June 1 – 20 |
| Nampa | May 10 – June 15 | June 1 – 20 |
| Pocatello | May 10 – June 15 | June 1 – 20 |
| Post Falls | May 5 – June 10 | June 1 – July 1 |
| Rathdrum | May 5 – June 10 | June 1 – July 1 |
| Rexburg | May 15 – June 10 | June 1 – 20 |
| Sandpoint | May 15 – June 10 | June 1 – 20 |
| Star | May 10 – June 15 | June 1 – 20 |
| Twin Falls | May 10 – June 15 | June 1 – 20 |
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 tomatoes.