When to plant potatoes 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). Potato needs 70–120 days to mature, which fits comfortably within District of Columbia's growing season.
When to plant potatoes in District of Columbia: the short answer
For a spring planting, sow Mar 22 – Apr 10. Seeds germinate in soil from 45 to 80°F.
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 potatoes in District of Columbia, step by step
- 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 4.8 and 6.5. Dig in compost before planting.
- Sow outdoors (Mar 22 – Apr 10). Space plants about 12 inches apart in rows 32 inches apart, sowing seed 4 inches deep. It tolerates a light frost but not a hard freeze. As a cool-season crop it does best before summer heat arrives in District of Columbia.
- 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: Colorado potato beetle, flea beetle, wireworm, aphids. Diseases and disorders: late blight, early blight, common scab, blackleg.
- Harvest (from about Jun 5 – Jul 25). Potato takes 70-120 days to reach harvest. Plant certified seed potatoes, not grocery-store ones. Hill soil or mulch over the stems as they grow to stop greening. New potatoes ~10 weeks in; storage potatoes after the tops die back.
Figures come from our crop data; dates use District of Columbia’s average frost dates. More in the full potato growing guide.
Potato 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 potato dates shift with them.
When to plant potatoes in nearby states
| State | Last frost | Sow |
|---|---|---|
| District of Columbia (this page) | April 10 | Mar 22 – Apr 10 |
| New Jersey | April 20 | Apr 1 – Apr 20 |
| Pennsylvania | May 1 | Apr 12 – May 1 |
| Delaware | April 14 | Mar 26 – Apr 14 |
| Maryland | April 14 | Mar 26 – Apr 14 |
| Virginia | April 15 | Mar 27 – Apr 15 |
| West Virginia | May 5 | Apr 16 – May 5 |
Questions gardeners in District of Columbia ask
When is the best time to plant potatoes in District of Columbia?
Sow potatoes in District of Columbia between March 22 and April 10. That timing is set by District of Columbia's average last spring frost of April 10.
When will potatoes planted in District of Columbia be ready to harvest?
Planted on time, potatoes are usually ready from about June 5 to July 25, 70-120 days after sowing.
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.