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