When to Plant Radishes in Montana
In a typical Montana location, sow outdoors Apr 9 – Apr 23. Across the state, the outdoor planting window starts as early as Mar 31 in Laurel and as late as May 9 in Butte. For a fall crop, plant around Aug 17 – Aug 31.
Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.
Radishes Planting Dates by City
| City | Direct sow | Fall planting |
|---|---|---|
| Billings | Apr 5 – Apr 19 | Aug 20 – Sep 3 |
| Missoula | Apr 5 – Apr 19 | Aug 20 – Sep 3 |
| Great Falls | Apr 1 – Apr 15 | Aug 20 – Sep 3 |
| Bozeman | Apr 21 – May 5 | Aug 11 – Aug 25 |
| Butte | May 9 – May 23 | Jul 25 – Aug 8 |
| Helena | Apr 4 – Apr 18 | Aug 19 – Sep 2 |
| Kalispell | Apr 26 – May 10 | Jul 30 – Aug 13 |
| Havre | Apr 10 – Apr 24 | Aug 12 – Aug 26 |
| Anaconda | Apr 27 – May 11 | Aug 3 – Aug 17 |
| Miles City | Apr 3 – Apr 17 | Aug 19 – Sep 2 |
| Helena Valley Southeast | Apr 4 – Apr 18 | Aug 19 – Sep 2 |
| Belgrade | Apr 21 – May 5 | Aug 5 – Aug 19 |
| Helena Valley West Central | Apr 4 – Apr 18 | Aug 19 – Sep 2 |
| Evergreen | Apr 26 – May 10 | Jul 30 – Aug 13 |
| Livingston | Apr 22 – May 6 | Aug 3 – Aug 17 |
| Whitefish | Apr 11 – Apr 25 | Aug 14 – Aug 28 |
| Laurel | Mar 31 – Apr 14 | Aug 22 – Sep 5 |
| Sidney | Apr 6 – Apr 20 | Aug 16 – Aug 30 |
| Lockwood | Apr 5 – Apr 19 | Aug 20 – Sep 3 |
| Lewistown | Apr 9 – Apr 23 | Aug 17 – Aug 31 |
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 radishes in Montana?
In a typical Montana location, sow outdoors Apr 9 – Apr 23. Across the state, the outdoor planting window starts as early as Mar 31 in Laurel and as late as May 9 in Butte. For a fall crop, plant around Aug 17 – Aug 31.
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 radishes take to grow?
Radishes typically take 22–30 days from planting to harvest. Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.
Other Crops in Montana
- Tomatoes
- Peppers
- Eggplant
- Cucumbers
- Zucchini
- Winter Squash
- Pumpkins
- Watermelon
- Cantaloupe
- Corn
- Green Beans
- Peas
- Lettuce
- Spinach
- Kale
- Arugula
- Swiss Chard
- Broccoli
- Cauliflower
- Cabbage
- Brussels Sprouts
- Carrots
- Beets
- Turnips
- Onions
- Garlic
- Potatoes
- Sweet Potatoes
- Asparagus
- Basil
- Cilantro
- Parsley
- Dill
- Oregano
- Thyme
- Sunflowers
- Zinnias
- Marigolds
- Cosmos
- Nasturtiums
- Dahlias
When to plant radishes in other states