Frost dates in Montana
Average last frost dates in Montana run from May 4 in Billings to June 13 in Butte-Silver Bow (balance).
| Place | Last frost | First frost |
|---|---|---|
| Belgrade | May 26 | Sept 16 |
| Billings | May 4 | Oct 7 |
| Bozeman | May 26 | Sept 22 |
| Butte-Silver Bow (balance) | June 13 | Sept 5 |
| Great Falls | May 6 | Oct 1 |
| Helena | May 9 | Sept 30 |
| Kalispell | May 31 | Sept 10 |
| Missoula | May 10 | Oct 1 |
Source: NOAA U.S. Climate Normals 1991–2020, nearest station to each place. Places of 10,000+ people (US Census Bureau, 2024 estimates) within 50 miles of a station.
When to plant in Montana
- Asparagus
- Lima Beans
- Green Beans
- Beets
- Broccoli
- Brussels Sprouts
- Cabbage
- Chinese Cabbage
- Carrots
- Cauliflower
- Celery
- Swiss Chard
- Collard Greens
- Sweet Corn
- Cucumbers
- Eggplant
- Garlic
- Kale
- Leeks
- Lettuce
- Cantaloupe
- Okra
- Onions
- Onion Sets
- Peas
- Black-Eyed Peas
- Peppers
- Potatoes
- Radishes
- Rhubarb
- Spinach
- Summer Squash (Zucchini)
- Winter Squash
- Sweet Potatoes
- Tomatoes
- Turnips
- Watermelon