When to Plant Corn in Montana
In a typical Montana location, sow outdoors May 14 – May 28. Across the state, the outdoor planting window starts as early as May 5 in Laurel and as late as Jun 13 in Butte.
Direct sow at last frost to 2 weeks after, once soil reaches 60F; does not transplant well. Succession sow every 2 weeks.
Corn Planting Dates by City
| City | Direct sow |
|---|---|
| Billings | May 10 – May 24 |
| Missoula | May 10 – May 24 |
| Great Falls | May 6 – May 20 |
| Bozeman | May 26 – Jun 9 |
| Butte | Jun 13 – Jun 27 |
| Helena | May 9 – May 23 |
| Kalispell | May 31 – Jun 14 |
| Havre | May 15 – May 29 |
| Anaconda | Jun 1 – Jun 15 |
| Miles City | May 8 – May 22 |
| Helena Valley Southeast | May 9 – May 23 |
| Belgrade | May 26 – Jun 9 |
| Helena Valley West Central | May 9 – May 23 |
| Evergreen | May 31 – Jun 14 |
| Livingston | May 27 – Jun 10 |
| Whitefish | May 16 – May 30 |
| Laurel | May 5 – May 19 |
| Sidney | May 11 – May 25 |
| Lockwood | May 10 – May 24 |
| Lewistown | May 14 – May 28 |
Showing the 20 most populous of 20 Montana cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Montana cities.
Frequently Asked Questions
When should I plant corn in Montana?
In a typical Montana location, sow outdoors May 14 – May 28. Across the state, the outdoor planting window starts as early as May 5 in Laurel and as late as Jun 13 in Butte.
When is the last frost in Montana?
The average last spring frost in Montana ranges from May 5 in Laurel to June 13 in Butte, based on NOAA 1991–2020 climate normals.
How long do corn take to grow?
Corn typically take 60–100 days from planting to harvest. Direct sow at last frost to 2 weeks after, once soil reaches 60F; does not transplant well. Succession sow every 2 weeks.
Other Crops in Montana
- Tomatoes
- Peppers
- Eggplant
- Cucumbers
- Zucchini
- Winter Squash
- Pumpkins
- Watermelon
- Cantaloupe
- Green Beans
- Peas
- Lettuce
- Spinach
- Kale
- Arugula
- Swiss Chard
- Broccoli
- Cauliflower
- Cabbage
- Brussels Sprouts
- Carrots
- Beets
- Radishes
- Turnips
- Onions
- Garlic
- Potatoes
- Sweet Potatoes
- Asparagus
- Basil
- Cilantro
- Parsley
- Dill
- Oregano
- Thyme
- Sunflowers
- Zinnias
- Marigolds
- Cosmos
- Nasturtiums
- Dahlias
When to plant corn in other states