When to plant radishes in Mississippi
Mississippi’s average last spring frost is March 20, and the first fall frost typically arrives around November 5 — about 230 frost-free days (USDA zones 7b, 8a, 8b, 9a). Radish needs 22–30 days to mature, which fits comfortably within Mississippi's growing season.
When to plant radishes in Mississippi: the short answer
For a spring planting, sow Feb 15 – Mar 6. Seeds germinate in soil from 40 to 85°F.
Succession sow again in Mississippi: Mar 2 · Mar 12 · Mar 22 · Apr 1 · Apr 11 · Apr 21
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 Mississippi, 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 (Feb 15 – Mar 6). 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 Mississippi.
- 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 14 – Mar 22). 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 Mississippi’s average frost dates. More in the full radish growing guide.
Radish planting dates by USDA zone in Mississippi
Mississippi spans USDA zones 7b, 8a, 8b, 9a. 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
Questions gardeners in Mississippi ask
When is the best time to plant radishes in Mississippi?
Sow radishes in Mississippi between February 15 and March 6. That timing is set by Mississippi's average last spring frost of March 20.
Can I plant radishes in the fall in Mississippi?
Yes. For a fall crop, sow between September 21 and October 8, so the crop matures in cool weather before Mississippi's first frost around November 5.
When will radishes planted in Mississippi be ready to harvest?
Planted on time, radishes are usually ready from about March 14 to March 22, 22-30 days after sowing.
When is the last frost in Mississippi?
On average around March 20, with the first fall frost around November 5 - about 230 frost-free days. Your town may differ by two weeks or more.