Cool-Season Vegetable

When to Plant Peas in Montana

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 Montana's humid climate. You can direct sow 6 weeks before your last frost — that's as early as May 10 - May 30 in Western Montana. Montana gardeners can also plant a fall crop. Alkaline soils common. Thin, dry soils in east. Better soils in valleys. Wind erosion challenges.

Montana Frost Dates

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

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

Peas Planting Schedule for Montana

Western Montana (Zones 4b, 5a, 5b)

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

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

Central Montana (Zones 3b, 4a, 4b)

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

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

Eastern Montana (Zones 3a, 3b, 4a)

Average last frost: May 10 - Jun 1 · Average first frost: Sep 10 - Sep 25

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

Growing Peas in Montana

Peas in Montana'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 Montana

Alkaline soils common. Thin, dry soils in east. Better soils in valleys. Wind erosion challenges.

Montana Climate & Growing Season

Short, intense growing season. Low humidity. Wide day-night temperature swings. Wind protection valuable. Peas can handle frost well, which is an advantage in Montana's climate. You can push planting dates earlier in spring and extend into fall.

Growing season length varies across Montana: Western Montana (4b, 5a, 5b) has a last frost around May 10 - May 30, while Eastern Montana (3a, 3b, 4a) sees frost end around May 10 - 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 Montana, but your exact planting dates depend on which region you're in. Western Montana gardeners should plan around a May 10 - May 30 last frost, while those in Eastern Montana 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 Montana Planting Calendar All plants for Montana 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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