When to plant potatoes in Oklahoma
Oklahoma’s average last spring frost is April 1, and the first fall frost typically arrives around November 1 — about 214 frost-free days (USDA zones 6b, 7a, 7b, 8a). Potato needs 70–120 days to mature, which fits comfortably within Oklahoma's growing season.
When to plant potatoes in Oklahoma: the short answer
For a spring planting, sow Mar 13 – Apr 1. 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 Oklahoma, 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 13 – Apr 1). 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 Oklahoma.
- 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 May 27 – Jul 16). 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 Oklahoma’s average frost dates. More in the full potato growing guide.
Potato planting dates by USDA zone in Oklahoma
Oklahoma spans USDA zones 6b, 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 |
|---|---|---|
| Oklahoma (this page) | April 1 | Mar 13 – Apr 1 |
| North Dakota | May 15 | Apr 26 – May 15 |
| South Dakota | May 10 | Apr 21 – May 10 |
| Nebraska | April 30 | Apr 11 – Apr 30 |
| Kansas | April 15 | Mar 27 – Apr 15 |
Questions gardeners in Oklahoma ask
When is the best time to plant potatoes in Oklahoma?
Sow potatoes in Oklahoma between March 13 and April 1. That timing is set by Oklahoma's average last spring frost of April 1.
When will potatoes planted in Oklahoma be ready to harvest?
Planted on time, potatoes are usually ready from about May 27 to July 16, 70-120 days after sowing.
When is the last frost in Oklahoma?
On average around April 1, with the first fall frost around November 1 - about 214 frost-free days. Your town may differ by two weeks or more.