Cool-Season Vegetable

When to Plant Peas in Wyoming

One of the earliest crops you can plant. Kids love picking and eating them right off the vine.

The Short Answer

Peas are cold-tolerant and do well in Wyoming's humid climate. You can direct sow 6 weeks before your last frost — that's as early as May 10 - May 30 in Eastern Wyoming. Wyoming gardeners can also plant a fall crop. Alkaline, thin soils. Dry climate means little organic matter naturally. Wind erosion a significant...

Wyoming Frost Dates

Your planting dates depend on which part of Wyoming you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Eastern Wyoming 4a, 4b, 5a May 10 - May 30 Sep 10 - Sep 25
Western Wyoming 3a, 3b, 4a May 25 - Jun 15 Aug 25 - Sep 15
Southern Wyoming 4b, 5a, 5b May 15 - Jun 1 Sep 5 - Sep 20

Peas Planting Schedule for Wyoming

Eastern Wyoming (Zones 4a, 4b, 5a)

Average last frost: May 10 - May 30 · Average first frost: Sep 10 - Sep 25

Direct Sow
6 wks before frost
Fall Planting
8 wks before first frost

Western Wyoming (Zones 3a, 3b, 4a)

Average last frost: May 25 - Jun 15 · Average first frost: Aug 25 - Sep 15

Direct Sow
6 wks before frost
Fall Planting
8 wks before first frost

Southern Wyoming (Zones 4b, 5a, 5b)

Average last frost: May 15 - Jun 1 · Average first frost: Sep 5 - Sep 20

Direct Sow
6 wks before frost
Fall Planting
8 wks before first frost

Growing Peas in Wyoming

Peas in Wyoming's Climate

Your cool climate is pea paradise. Direct sow as soon as soil thaws — peas germinate in soil as cool as 40°F and handle frost without flinching. Michigan, Wisconsin, and Minnesota gardeners often get the longest pea season in the country because their moderate summer temperatures delay the heat-induced decline that ends pea production rapidly in warmer zones.

Soil Considerations for Wyoming

Alkaline, thin soils. Dry climate means little organic matter naturally. Wind erosion a significant challenge. Heavy amendment needed.

Wyoming Climate & Growing Season

Short growing season. Very windy — wind protection essential for gardens. Low humidity. Cool nights even in summer at elevation. Peas can handle frost well, which is an advantage in Wyoming's climate. You can push planting dates earlier in spring and extend into fall.

Growing season length varies across Wyoming: Eastern Wyoming (4a, 4b, 5a) has a last frost around May 10 - May 30, while Southern Wyoming (4b, 5a, 5b) sees frost end around May 15 - Jun 1. This difference matters for peas — but peas handle frost well, so the timing difference is less critical.

Growing Tips

Direct sow as early as the soil can be worked. Inoculate with rhizobium for bigger harvests. Provide a trellis for climbing varieties.

Companion Planting

Plant peas alongside these companions for better growth:

Carrots Radishes Corn Cucumbers

Keep peas away from:

Onions Garlic

The Bottom Line

Peas can be grown successfully across Wyoming, but your exact planting dates depend on which region you're in. Eastern Wyoming gardeners should plan around a May 10 - May 30 last frost, while those in Southern Wyoming can typically plant later. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Peas Growing Guide National planting guide with all states Wyoming Planting Calendar All plants for Wyoming Peas in Alabama Alabama planting dates Peas in Alaska Alaska planting dates Peas in Arizona Arizona planting dates Peas in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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