When to plant peas in Wyoming
Wyoming’s average last spring frost is May 20, and the first fall frost typically arrives around September 15 — about 118 frost-free days (USDA zones 3a, 3b, 4a, 4b, 5a, 6a). Pea needs 55–70 days to mature, which fits comfortably within Wyoming's growing season.
Wyoming covers a wide range of climates, so your exact frost dates may differ from the state average by two weeks or more. For dates tuned to your town, use the calendar generator.
When to plant peas in Wyoming: the short answer
For a spring planting, sow Apr 10 – Apr 29. Seeds germinate in soil from 40 to 85°F.
Succession sow again in Wyoming: Apr 27 · May 9 · May 21 · Jun 2 · Jun 14
Spring succession stops before summer heat makes it bolt. Start sowing again in late summer for a fall crop (see the fall window above).
Windows are ~1–2 week bands around each date. Frost dates are a statewide average from NOAA/NCEI normals; your town may differ by two weeks or more. Calendar year 2026.
How to grow peas in Wyoming, step by step
- Prepare the bed. They need at least six to eight hours of direct sun a day and loose soil at least 18 inches deep, with a pH between 6.0 and 7.5. Dig in compost before planting.
- Sow outdoors (Apr 10 – Apr 29). Space plants about 2 inches apart in rows 18 inches apart, sowing seed 1 inch deep. It handles frost well, so it can go out before the last frost date. As a cool-season crop it does best before summer heat arrives in Wyoming.
- Water and feed. Give it steady, even moisture, about an inch of water a week from rain or the hose.
- Watch for pests and problems. Pests: aphids, pea weevil, armyworm. Diseases and disorders: powdery mildew, fusarium wilt, root rot.
- Harvest (from about Jun 9 – Jun 24). Pea takes 55-70 days to reach harvest. Sow as soon as the soil can be worked - 4 to 6 weeks before the last frost. Production stops once daytime highs stay above ~80 F.
Figures come from our crop data; dates use Wyoming’s average frost dates. More in the full pea growing guide.
Pea planting dates by USDA zone in Wyoming
Wyoming spans USDA zones 3a, 3b, 4a, 4b, 5a, 6a. Colder zones, usually higher or further inland, have a later last spring frost and an earlier first fall frost than the state average, so the pea dates shift with them.
When to plant peas in nearby states
Questions gardeners in Wyoming ask
When is the best time to plant peas in Wyoming?
Sow peas in Wyoming between April 10 and April 29. That timing is set by Wyoming's average last spring frost of May 20; Wyoming spans several climates, so cooler and higher parts of the state run later.
Can I plant peas in the fall in Wyoming?
Yes. For a fall crop, sow between June 27 and July 14, so the crop matures in cool weather before Wyoming's first frost around September 15.
When will peas planted in Wyoming be ready to harvest?
Planted on time, peas are usually ready from about June 9 to June 24, 55-70 days after sowing.
When is the last frost in Wyoming?
On average around May 20, with the first fall frost around September 15 - about 118 frost-free days. Your town may differ by two weeks or more.