When to plant chili peppers in Delaware
Delaware’s average last spring frost is April 14, and the first fall frost typically arrives around October 22 — about 191 frost-free days (USDA zones 7a, 7b). Chili Pepper needs 70–100 days to mature, which fits comfortably within Delaware's growing season.
When to plant chili peppers in Delaware: the short answer
For a spring planting, plant out Apr 21 – May 8, with seeds started indoors Feb 10 – Feb 24. 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 Delaware, step by step
- Start seeds indoors (Feb 10 – Feb 24). 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 21 – May 8). 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 7 – Aug 6). 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 Delaware’s average frost dates. More in the full chili pepper growing guide.
When to plant chili peppers in nearby states
| State | Last frost | Plant out |
|---|---|---|
| Delaware (this page) | April 14 | Apr 21 – May 8 |
| New Jersey | April 20 | Apr 27 – May 14 |
| Pennsylvania | May 1 | May 8 – May 25 |
| Maryland | April 14 | Apr 21 – May 8 |
| District of Columbia | April 10 | Apr 17 – May 4 |
| Virginia | April 15 | Apr 22 – May 9 |
| West Virginia | May 5 | May 12 – May 29 |
Questions gardeners in Delaware ask
When is the best time to plant chili peppers in Delaware?
Plant chili pepper transplants outdoors in Delaware between April 21 and May 8. That timing is set by Delaware's average last spring frost of April 14.
When should I start chili pepper seeds indoors in Delaware?
Start seeds indoors between February 10 and February 24, about 8 weeks before the last frost, so the seedlings are ready to plant out from April 21.
What is the latest I can plant chili peppers in Delaware?
About August 13. Chili peppers need at least 70 days to mature after transplanting, and frost around October 22 ends the season, so later plantings risk being cut short.
When will chili peppers planted in Delaware be ready to harvest?
Planted on time, chili peppers are usually ready from about July 7 to August 6, 70-100 days after transplanting.
When is the last frost in Delaware?
On average around April 14, with the first fall frost around October 22 - about 191 frost-free days. Your town may differ by two weeks or more.