Utah Planting Guide & Growing Season
Utah is in USDA hardiness zone with a growing season of 155 days. The average last spring frost is Apr 15 - May 30 and the average first fall frost is Sep 15 - Oct 31.
Growing Conditions in Utah
How Utah Compares
Compare Utah's growing conditions with states that have similar climates.
| State | USDA Zone | Last Frost | First Frost | Season (days) |
|---|---|---|---|---|
| Utah (UT) | Apr 15 - May 30 | Sep 15 - Oct 31 | 155 | |
| 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 Utah
When should I start seeds indoors in Utah?
In Utah, the average last frost date is Apr 15 - May 30. Start most seeds indoors 6-8 weeks before this date. The USDA hardiness zone for Utah is undefined, with a growing season of approximately 155 days.
What USDA hardiness zone is Utah?
Utah 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 Utah?
The average first frost date in Utah is Sep 15 - Oct 31. Plan to harvest cold-sensitive crops before this date or protect them with row covers.
How long is the growing season in Utah?
Utah has an average growing season of 155 days, from the last frost (Apr 15 - May 30) to first frost (Sep 15 - Oct 31). This moderate season works well for most common vegetables.
Plan Your Garden
Use our seed starting calculator to get personalized planting dates, or browse all states.