North Dakota Planting Guide & Growing Season
North Dakota is in USDA hardiness zone 3a-4b with a growing season of 130 days. The average last spring frost is May 15 and the average first fall frost is Sep 20.
Growing Conditions in North Dakota
How North Dakota Compares
Compare North Dakota's growing conditions with states that have similar climates.
| State | USDA Zone | Last Frost | First Frost | Season (days) |
|---|---|---|---|---|
| North Dakota (ND) | 3a-4b | May 15 | Sep 20 | 130 |
| Alabama (AL) | 7a-8b | Mar 15 | Nov 5 | 235 |
| Alaska (AK) | 1a-7b | May 30 | Sep 5 | 100 |
| Arizona (AZ) | 4b-10b | Mar 1 | Nov 15 | 260 |
| Arkansas (AR) | 6b-8a | Apr 1 | Oct 25 | 210 |
| California (CA) | 4b-11a | Feb 15 | Nov 30 | 290 |
Frequently Asked Questions About Gardening in North Dakota
When should I start seeds indoors in North Dakota?
In North Dakota, the average last frost date is May 15. Start most seeds indoors 6-8 weeks before this date. The USDA hardiness zone for North Dakota is 3a-4b, with a growing season of approximately 130 days.
What USDA hardiness zone is North Dakota?
North Dakota falls in USDA hardiness zones 3a-4b. This affects which perennial plants will survive winter and influences optimal planting times.
When is the first frost in North Dakota?
The average first frost date in North Dakota is Sep 20. Plan to harvest cold-sensitive crops before this date or protect them with row covers.
How long is the growing season in North Dakota?
North Dakota has an average growing season of 130 days, from the last frost (May 15) to first frost (Sep 20). This shorter season requires starting many crops indoors and choosing quick-maturing varieties.
Plan Your Garden
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