Wyoming Planting Guide & Growing Season
Wyoming is in USDA hardiness zone with a growing season of 115 days. The average last spring frost is May 15 - Jun 15 and the average first fall frost is Sep 1 - Sep 30.
Growing Conditions in Wyoming
How Wyoming Compares
Compare Wyoming's growing conditions with states that have similar climates.
| State | USDA Zone | Last Frost | First Frost | Season (days) |
|---|---|---|---|---|
| Wyoming (WY) | May 15 - Jun 15 | Sep 1 - Sep 30 | 115 | |
| Alabama (AL) | Mar 1 - Apr 1 | Oct 25 - Nov 15 | 220 | |
| Alaska (AK) | May 15 - Jun 15 | Aug 15 - Sep 15 | 105 | |
| Arizona (AZ) | Feb 1 - Apr 15 | Oct 15 - Dec 15 | 270 | |
| Arkansas (AR) | Mar 15 - Apr 15 | Oct 15 - Nov 1 | 210 | |
| California (CA) | Jan 15 - Apr 15 | Oct 15 - Dec 31 | 290 |
Frequently Asked Questions About Gardening in Wyoming
When should I start seeds indoors in Wyoming?
In Wyoming, the average last frost date is May 15 - Jun 15. Start most seeds indoors 6-8 weeks before this date. The USDA hardiness zone for Wyoming is undefined, with a growing season of approximately 115 days.
What USDA hardiness zone is Wyoming?
Wyoming falls in USDA hardiness zones undefined. This affects which perennial plants will survive winter and influences optimal planting times.
When is the first frost in Wyoming?
The average first frost date in Wyoming is Sep 1 - Sep 30. Plan to harvest cold-sensitive crops before this date or protect them with row covers.
How long is the growing season in Wyoming?
Wyoming has an average growing season of 115 days, from the last frost (May 15 - Jun 15) to first frost (Sep 1 - Sep 30). This shorter season requires starting many crops indoors and choosing quick-maturing varieties.
Plan Your Garden
Use our seed starting calculator to get personalized planting dates, or browse all states.