When to plant chili peppers in New Mexico
New Mexico’s average last spring frost is April 20, and the first fall frost typically arrives around October 20 — about 183 frost-free days (USDA zones 4b, 5b, 6b, 7a, 7b, 8a, 9a). Chili Pepper needs 70–100 days to mature, which fits comfortably within New Mexico's growing season.
New Mexico 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 New Mexico: the short answer
For a spring planting, plant out Apr 27 – May 14, with seeds started indoors Feb 16 – Mar 2. 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 New Mexico, step by step
- Start seeds indoors (Feb 16 – Mar 2). 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 27 – May 14). 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 Jul 13 – Aug 12). 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 New Mexico’s average frost dates. More in the full chili pepper growing guide.
Chili Pepper planting dates by USDA zone in New Mexico
New Mexico spans USDA zones 4b, 5b, 6b, 7a, 7b, 8a, 9a. 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.
| Zone | Last frost | First frost | Season | Start indoors | Plant chili pepper |
|---|---|---|---|---|---|
| Zone 4 | May 10 | Sep 25 | 135 days | Mar 8 – Mar 22 | May 17 – Jun 3 |
| Zone 5 | Apr 30 | Oct 5 | 160 days | Feb 26 – Mar 12 | May 7 – May 24 |
| Zone 6 | Apr 15 | Oct 15 | 185 days | Feb 11 – Feb 25 | Apr 22 – May 9 |
| Zone 7 | Apr 5 | Oct 25 | 200 days | Feb 1 – Feb 15 | Apr 12 – Apr 29 |
| Zone 8 | Mar 20 | Nov 5 | 230 days | Jan 16 – Jan 30 | Mar 27 – Apr 13 |
| Zone 9 | Feb 20 | Nov 30 | 280 days | Dec 19 – Jan 2 | Feb 27 – Mar 16 |
When to plant chili peppers in nearby states
| State | Last frost | Plant out |
|---|---|---|
| New Mexico (this page) | April 20 | Apr 27 – May 14 |
| Arizona | March 15 | Mar 22 – Apr 8 |
Questions gardeners in New Mexico ask
When is the best time to plant chili peppers in New Mexico?
Plant chili pepper transplants outdoors in New Mexico between April 27 and May 14. That timing is set by New Mexico's average last spring frost of April 20; New Mexico spans several climates, so cooler and higher parts of the state run later.
When should I start chili pepper seeds indoors in New Mexico?
Start seeds indoors between February 16 and March 2, about 8 weeks before the last frost, so the seedlings are ready to plant out from April 27.
What is the latest I can plant chili peppers in New Mexico?
About August 11. Chili peppers need at least 70 days to mature after transplanting, and frost around October 20 ends the season, so later plantings risk being cut short.
When will chili peppers planted in New Mexico be ready to harvest?
Planted on time, chili peppers are usually ready from about July 13 to August 12, 70-100 days after transplanting.
When is the last frost in New Mexico?
On average around April 20, with the first fall frost around October 20 - about 183 frost-free days. Your town may differ by two weeks or more.