When to plant chili peppers in Oklahoma
Oklahoma’s average last spring frost is April 1, and the first fall frost typically arrives around November 1 — about 214 frost-free days (USDA zones 6b, 7a, 7b, 8a). Chili Pepper needs 70–100 days to mature, which fits comfortably within Oklahoma's growing season.
When to plant chili peppers in Oklahoma: the short answer
For a spring planting, plant out Apr 8 – Apr 25, with seeds started indoors Jan 28 – Feb 11. 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 Oklahoma, step by step
- Start seeds indoors (Jan 28 – Feb 11). 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 (Apr 8 – Apr 25). 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 Jun 24 – Jul 24). 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 Oklahoma’s average frost dates. More in the full chili pepper growing guide.
Chili Pepper planting dates by USDA zone in Oklahoma
Oklahoma spans USDA zones 6b, 7a, 7b, 8a. 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
| State | Last frost | Plant out |
|---|---|---|
| Oklahoma (this page) | April 1 | Apr 8 – Apr 25 |
| North Dakota | May 15 | May 22 – Jun 8 |
| South Dakota | May 10 | May 17 – Jun 3 |
| Nebraska | April 30 | May 7 – May 24 |
| Kansas | April 15 | Apr 22 – May 9 |
Questions gardeners in Oklahoma ask
When is the best time to plant chili peppers in Oklahoma?
Plant chili pepper transplants outdoors in Oklahoma between April 8 and April 25. That timing is set by Oklahoma's average last spring frost of April 1.
When should I start chili pepper seeds indoors in Oklahoma?
Start seeds indoors between January 28 and February 11, about 8 weeks before the last frost, so the seedlings are ready to plant out from April 8.
What is the latest I can plant chili peppers in Oklahoma?
About August 23. Chili peppers need at least 70 days to mature after transplanting, and frost around November 1 ends the season, so later plantings risk being cut short.
When will chili peppers planted in Oklahoma be ready to harvest?
Planted on time, chili peppers are usually ready from about June 24 to July 24, 70-100 days after transplanting.
When is the last frost in Oklahoma?
On average around April 1, with the first fall frost around November 1 - about 214 frost-free days. Your town may differ by two weeks or more.