Frost Dates & Planting Calendars in North Dakota
In North Dakota, the average last spring frost ranges from May 4 in Wahpeton to May 21 in Beulah, and the average first fall frost from September 20 in Beulah to October 7 in Grafton. Pick a city for its full frost-date summary and 42-crop planting calendar.
| City | Last Spring Frost (typical) | First Fall Frost (typical) | Growing Season | USDA Zone |
|---|---|---|---|---|
| Fargo | May 5 | October 3 | 150 days | 4a |
| Bismarck | May 10 | September 30 | 142 days | 4a |
| Grand Forks | May 10 | October 1 | 144 days | 4a |
| Minot | May 10 | October 1 | 144 days | 4a |
| West Fargo | May 10 | September 30 | 143 days | 4a |
| Williston | May 21 | September 21 | 123 days | 4a |
| Dickinson | May 20 | September 22 | 123 days | 4b |
| Mandan | May 13 | September 27 | 136 days | 4a |
| Jamestown | May 8 | September 29 | 143 days | 4b |
| Wahpeton | May 4 | October 3 | 152 days | 4a |
| Devils Lake | May 6 | October 5 | 152 days | 4a |
| Watford City | May 9 | September 27 | 139 days | 4a |
| Valley City | May 13 | September 26 | 136 days | 4a |
| Minot Air Force Base | May 11 | September 29 | 138 days | 4a |
| Grafton | May 4 | October 7 | 156 days | 4a |
| Lincoln | May 14 | September 30 | 138 days | 4a |
| Beulah | May 21 | September 20 | 121 days | 4a |
| Rugby | May 17 | September 23 | 129 days | 3b |
| Stanley | May 17 | September 23 | 127 days | 4a |
| Horace | May 4 | October 2 | 151 days | 4a |
When to Plant in North Dakota
- 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
- Radishes
- Turnips
- Onions
- Garlic
- Potatoes
- Sweet Potatoes
- Asparagus
- Basil
- Cilantro
- Parsley
- Dill
- Oregano
- Thyme
- Sunflowers
- Zinnias
- Marigolds
- Cosmos
- Nasturtiums
- Dahlias