When to plant tomatoes 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). Tomato needs 60–85 days to mature, which fits comfortably within District of Columbia's growing season.
When to plant tomatoes in District of Columbia: the short answer
For a spring planting, plant out Apr 10 – Apr 27, with seeds started indoors Feb 13 – Feb 27. Wait until the soil is at least 50°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 tomatoes in District of Columbia, step by step
- Start seeds indoors (Feb 13 – Feb 27). Sow seeds ¼ inch deep in seed-starting mix under bright light. They take 5-10 days to sprout, fastest in soil around 80°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 7.5. Dig in compost before planting.
- Plant out (Apr 10 – Apr 27). Space plants about 24 inches apart in rows 36 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: tomato hornworm, aphids, whitefly, flea beetle. Diseases and disorders: early blight, late blight, septoria leaf spot, fusarium wilt, blossom-end rot (calcium disorder).
- Harvest (from about Jun 16 – Jul 11). Tomato takes 60-85 days to reach harvest. Days to maturity counted from transplant. Bury 2/3 of the stem at transplanting for extra roots. Determinate types suit containers and one big harvest; indeterminate types need staking and produce until frost.
Figures come from our crop data; dates use District of Columbia’s average frost dates. More in the full tomato growing guide.
Tomato 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 tomato dates shift with them.
When to plant tomatoes in nearby states
| State | Last frost | Plant out |
|---|---|---|
| District of Columbia (this page) | April 10 | Apr 10 – Apr 27 |
| New Jersey | April 20 | Apr 20 – May 7 |
| Pennsylvania | May 1 | May 1 – May 18 |
| Delaware | April 14 | Apr 14 – May 1 |
| Maryland | April 14 | Apr 14 – May 1 |
| Virginia | April 15 | Apr 15 – May 2 |
| West Virginia | May 5 | May 5 – May 22 |
Questions gardeners in District of Columbia ask
When is the best time to plant tomatoes in District of Columbia?
Plant tomato transplants outdoors in District of Columbia between April 10 and April 27. That timing is set by District of Columbia's average last spring frost of April 10.
When should I start tomato seeds indoors in District of Columbia?
Start seeds indoors between February 13 and February 27, about 7 weeks before the last frost, so the seedlings are ready to plant out from April 10.
What is the latest I can plant tomatoes in District of Columbia?
About August 26. Tomatoes need at least 60 days to mature after transplanting, and frost around October 25 ends the season, so later plantings risk being cut short.
When will tomatoes planted in District of Columbia be ready to harvest?
Planted on time, tomatoes are usually ready from about June 16 to July 11, 60-85 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.