When to plant arugula 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). Arugula needs 30–40 days to mature, which fits comfortably within Oklahoma's growing season.
When to plant arugula in Oklahoma: the short answer
For a spring planting, sow Feb 27 – Mar 18. Seeds germinate in soil from 40 to 75°F.
Succession sow again in Oklahoma: Mar 16 · Mar 28 · Apr 9 · Apr 21 · May 3
Spring succession stops before summer heat makes it bolt. Start sowing again in late summer for a fall crop (see the fall window above).
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 arugula in Oklahoma, step by step
- Prepare the bed. It needs six or more hours of sun for the best growth, though four to six hours in partial shade is enough and loose soil at least 8 inches deep, with a pH between 6.0 and 7.0. Dig in compost before planting.
- Sow outdoors (Feb 27 – Mar 18). Space plants about 4 inches apart in rows 10 inches apart, sowing seed ¼ inch deep. It handles frost well, so it can go out before the last frost date. 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: flea beetle, aphids, cabbage worm. Diseases and disorders: downy mildew, white rust.
- Harvest (from about Apr 3 – Apr 13). Arugula takes 30-40 days to reach harvest. One of the fastest crops - baby leaves in about 3 weeks. Turns sharp and bitter and bolts in heat, so it is a spring/fall green. Flea beetles love it; grow under mesh.
Figures come from our crop data; dates use Oklahoma’s average frost dates. More in the full arugula growing guide.
Arugula 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 arugula dates shift with them.
When to plant arugula in nearby states
| State | Last frost | Sow |
|---|---|---|
| Oklahoma (this page) | April 1 | Feb 27 – Mar 18 |
| North Dakota | May 15 | Apr 12 – May 1 |
| South Dakota | May 10 | Apr 7 – Apr 26 |
| Nebraska | April 30 | Mar 28 – Apr 16 |
| Kansas | April 15 | Mar 13 – Apr 1 |
Questions gardeners in Oklahoma ask
When is the best time to plant arugula in Oklahoma?
Sow arugula in Oklahoma between February 27 and March 18. That timing is set by Oklahoma's average last spring frost of April 1.
Can I plant arugula in the fall in Oklahoma?
Yes. For a fall crop, sow between September 10 and September 27, so the crop matures in cool weather before Oklahoma's first frost around November 1.
When will arugula planted in Oklahoma be ready to harvest?
Planted on time, arugula is usually ready from about April 3 to April 13, 30-40 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.