When to plant chili peppers 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). Chili Pepper needs 70–100 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 chili peppers in Wyoming: the short answer
For a spring planting, plant out May 27 – Jun 13, with seeds started indoors Mar 18 – Apr 1. Wait until the soil is at least 65°F and frost is over.
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 chili peppers in Wyoming, step by step
- Start seeds indoors (Mar 18 – Apr 1). Sow seeds ¼ inch deep in seed-starting mix under bright light. They take 7-21 days to sprout, fastest in soil around 85°F. Harden seedlings off for a week before they go outside.
- Prepare the bed. They need at least six to eight hours of direct sun a day and loose soil at least 12 inches deep, with a pH between 5.5 and 7.0. Dig in compost before planting.
- Plant out (May 27 – Jun 13). Space plants about 18 inches apart in rows 24 inches apart. It is killed by frost, so nothing goes outside until the danger has passed.
- 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, flea beetle, pepper maggot, spider mite. Diseases and disorders: bacterial leaf spot, anthracnose, phytophthora blight.
- Harvest (from about Aug 12 – Sep 11). Chili Pepper takes 70-100 days to reach harvest. Superhots (C. chinense) can need 100+ days and the longest indoor start. Withholding some water late raises heat.
Figures come from our crop data; dates use Wyoming’s average frost dates. More in the full chili pepper growing guide.
Chili Pepper 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 chili pepper dates shift with them.
When to plant chili peppers in nearby states
Questions gardeners in Wyoming ask
When is the best time to plant chili peppers in Wyoming?
Plant chili pepper transplants outdoors in Wyoming between May 27 and June 13. 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.
When should I start chili pepper seeds indoors in Wyoming?
Start seeds indoors between March 18 and April 1, about 8 weeks before the last frost, so the seedlings are ready to plant out from May 27.
What is the latest I can plant chili peppers in Wyoming?
About July 7. Chili peppers need at least 70 days to mature after transplanting, and frost around September 15 ends the season, so later plantings risk being cut short.
When will chili peppers planted in Wyoming be ready to harvest?
Planted on time, chili peppers are usually ready from about August 12 to September 11, 70-100 days after transplanting.
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.