When to plant radishes in Arkansas
Arkansas’s average last spring frost is April 3, and the first fall frost typically arrives around November 1 — about 212 frost-free days (USDA zones 6b, 7a, 7b, 8a). Radish needs 22–30 days to mature, which fits comfortably within Arkansas's growing season.
When to plant radishes in Arkansas: the short answer
For a spring planting, sow Mar 1 – Mar 20. Seeds germinate in soil from 40 to 85°F.
Succession sow again in Arkansas: Mar 16 · Mar 26 · Apr 5 · Apr 15 · Apr 25 · May 5
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 radishes in Arkansas, step by step
- Prepare the bed. They need 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 6 inches deep, with a pH between 6.0 and 7.0. Dig in compost before planting.
- Sow outdoors (Mar 1 – Mar 20). Space plants about 2 inches apart in rows 6 inches apart, sowing seed ½ 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 Arkansas.
- 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, cabbage root maggot, aphids. Diseases and disorders: clubroot, scab, downy mildew.
- Harvest (from about Mar 28 – Apr 5). Radish takes 22-30 days to reach harvest. The classic marker crop and quick filler. Sow a short row every 10 days - a single big sowing all matures at once and then goes pithy and hot.
Figures come from our crop data; dates use Arkansas’s average frost dates. More in the full radish growing guide.
Radish planting dates by USDA zone in Arkansas
Arkansas 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 radish dates shift with them.
When to plant radishes in nearby states
| State | Last frost | Sow |
|---|---|---|
| Arkansas (this page) | April 3 | Mar 1 – Mar 20 |
| Alabama | March 25 | Feb 20 – Mar 11 |
| Mississippi | March 20 | Feb 15 – Mar 6 |
| Louisiana | March 5 | Jan 31 – Feb 19 |
| Florida | February 12 | Jan 10 – Jan 29 |
Questions gardeners in Arkansas ask
When is the best time to plant radishes in Arkansas?
Sow radishes in Arkansas between March 1 and March 20. That timing is set by Arkansas's average last spring frost of April 3.
Can I plant radishes in the fall in Arkansas?
Yes. For a fall crop, sow between September 17 and October 4, so the crop matures in cool weather before Arkansas's first frost around November 1.
When will radishes planted in Arkansas be ready to harvest?
Planted on time, radishes are usually ready from about March 28 to April 5, 22-30 days after sowing.
When is the last frost in Arkansas?
On average around April 3, with the first fall frost around November 1 - about 212 frost-free days. Your town may differ by two weeks or more.