When to plant eggplants in District of Columbia
District of Columbia’s average last spring frost is April 10, and the first fall frost typically arrives around October 25 — about 198 frost-free days (USDA zones 7a, 7b, 8a). Eggplant needs 65–85 days to mature, which fits comfortably within District of Columbia's growing season.
When to plant eggplants in District of Columbia: the short answer
For a spring planting, plant out Apr 24 – May 11, with seeds started indoors Jan 30 – Feb 13. Wait until the soil is at least 70°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 eggplants in District of Columbia, step by step
- Start seeds indoors (Jan 30 – Feb 13). Sow seeds ¼ inch deep in seed-starting mix under bright light. They take 7-14 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 18 inches deep, with a pH between 5.5 and 6.5. Dig in compost before planting.
- Plant out (Apr 24 – May 11). Space plants about 20 inches apart in rows 30 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: flea beetle, Colorado potato beetle, aphids, spider mite. Diseases and disorders: verticillium wilt, phomopsis blight, bacterial wilt.
- Harvest (from about Jul 5 – Jul 25). Eggplant takes 65-85 days to reach harvest. The most heat-demanding common vegetable - do not rush it into cold soil. Flea beetles hammer young plants; a row cover until flowering pays off.
Figures come from our crop data; dates use District of Columbia’s average frost dates. More in the full eggplant growing guide.
Eggplant planting dates by USDA zone in District of Columbia
District of Columbia spans USDA zones 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 eggplant dates shift with them.
When to plant eggplants in nearby states
| State | Last frost | Plant out |
|---|---|---|
| District of Columbia (this page) | April 10 | Apr 24 – May 11 |
| New Jersey | April 20 | May 4 – May 21 |
| Pennsylvania | May 1 | May 15 – Jun 1 |
| Delaware | April 14 | Apr 28 – May 15 |
| Maryland | April 14 | Apr 28 – May 15 |
| Virginia | April 15 | Apr 29 – May 16 |
| West Virginia | May 5 | May 19 – Jun 5 |
Questions gardeners in District of Columbia ask
When is the best time to plant eggplants in District of Columbia?
Plant eggplant transplants outdoors in District of Columbia between April 24 and May 11. That timing is set by District of Columbia's average last spring frost of April 10.
When should I start eggplant seeds indoors in District of Columbia?
Start seeds indoors between January 30 and February 13, about 9 weeks before the last frost, so the seedlings are ready to plant out from April 24.
What is the latest I can plant eggplants in District of Columbia?
About August 21. Eggplants need at least 65 days to mature after transplanting, and frost around October 25 ends the season, so later plantings risk being cut short.
When will eggplants planted in District of Columbia be ready to harvest?
Planted on time, eggplants are usually ready from about July 5 to July 25, 65-85 days after transplanting.
When is the last frost in District of Columbia?
On average around April 10, with the first fall frost around October 25 - about 198 frost-free days. Your town may differ by two weeks or more.