When to plant Cucumbers in Montana
In spring, from May 15 – June 15 in Billings to May 20 – June 15 in Missoula.
In fall, June 1 – 15.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Belgrade | Not listed | June 1 – 15 |
| Billings | May 15 – June 15 | June 1 – July 1 |
| Bozeman | Not listed | June 1 – 15 |
| Butte-Silver Bow (balance) | Not listed | Not listed |
| Great Falls | May 20 – June 15 | June 1 – July 1 |
| Helena | May 20 – June 15 | June 1 – July 1 |
| Kalispell | Not listed | Not listed |
| Missoula | May 20 – 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. “—” means the place's frost date is outside the table. The full USDA table for cucumbers.