When to plant eggplants 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). Eggplant needs 65–85 days to mature, which fits comfortably within Oklahoma's growing season.
When to plant eggplants in Oklahoma: the short answer
For a spring planting, plant out Apr 15 – May 2, with seeds started indoors Jan 21 – Feb 4. 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 Oklahoma, step by step
- Start seeds indoors (Jan 21 – Feb 4). 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 15 – May 2). 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 Jun 26 – Jul 16). 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 Oklahoma’s average frost dates. More in the full eggplant growing guide.
Eggplant 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 eggplant dates shift with them.
When to plant eggplants in nearby states
| State | Last frost | Plant out |
|---|---|---|
| Oklahoma (this page) | April 1 | Apr 15 – May 2 |
| North Dakota | May 15 | May 29 – Jun 15 |
| South Dakota | May 10 | May 24 – Jun 10 |
| Nebraska | April 30 | May 14 – May 31 |
| Kansas | April 15 | Apr 29 – May 16 |
Questions gardeners in Oklahoma ask
When is the best time to plant eggplants in Oklahoma?
Plant eggplant transplants outdoors in Oklahoma between April 15 and May 2. That timing is set by Oklahoma's average last spring frost of April 1.
When should I start eggplant seeds indoors in Oklahoma?
Start seeds indoors between January 21 and February 4, about 9 weeks before the last frost, so the seedlings are ready to plant out from April 15.
What is the latest I can plant eggplants in Oklahoma?
About August 28. Eggplants need at least 65 days to mature after transplanting, and frost around November 1 ends the season, so later plantings risk being cut short.
When will eggplants planted in Oklahoma be ready to harvest?
Planted on time, eggplants are usually ready from about June 26 to July 16, 65-85 days after transplanting.
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.