Utah Planting Calendar

Frost dates, growing zones, and planting dates for Utah gardeners.

Zone 4a Zone 4b Zone 5a Zone 5b Zone 6a Zone 6b Zone 7a Zone 7b

The Short Answer

Utah spans USDA zones 4a through 7b, which means planting dates vary significantly across the state. Wasatch Front (SLC) has an average last frost around Apr 20 - May 10, while Southern Utah sees its last frost around Apr 10 - May 1. Use our homepage tool with your zip code for dates specific to your exact location.

Utah Frost Dates by Region

Arid climate. Intense sun. Low humidity. Wide temperature swings. Irrigation essential everywhere.

Region Zones Last Frost (Spring) First Frost (Fall)
Wasatch Front (SLC) 6a, 6b, 7a Apr 20 - May 10 Oct 1 - Oct 20
Mountain Regions 4a, 4b, 5a May 25 - Jun 15 Aug 25 - Sep 15
Southern Utah 6b, 7a, 7b Apr 10 - May 1 Oct 10 - Nov 1

Soil & Growing Conditions

Alkaline desert soils. Low organic matter. Saline soils in some areas. Heavy amendment with compost and sulfur needed.

What to Plant in Utah

Utah's long season gives you two planting windows and room for crops that colder states can't grow. The key is timing around your summer heat peak:

Heat Lovers (Utah's Advantage)

OkraSweet PotatoesWatermelonEggplantPeppers

Spring & Fall Crops

TomatoesCucumbersBeans (Green/Snap)Squash (Summer)Corn (Sweet)BasilGarlicLettuceBroccoliCarrotsKalePeas

Flowers & Perennials

SunflowersZinniasLavenderMarigoldsDaylilies

Browse all 100 plants — or enter your zip code for personalized planting dates.

Neighboring States

Gardeners near state borders may find useful information in neighboring state guides:

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Vermont Virginia Washington West Virginia Wisconsin Wyoming
Note: Frost dates are based on NOAA 30-year Climate Normals and represent historical averages. Actual frost dates can vary significantly year to year. Zone data is from the USDA Plant Hardiness Zone Map.

Last reviewed: March 29, 2026

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