When to plant arugula in Kentucky
Kentucky’s average last spring frost is April 18, and the first fall frost typically arrives around October 20 — about 185 frost-free days (USDA zones 6a, 6b, 7a). Arugula needs 30–40 days to mature, which fits comfortably within Kentucky's growing season.
When to plant arugula in Kentucky: the short answer
For a spring planting, sow Mar 16 – Apr 4. Seeds germinate in soil from 40 to 75°F.
Succession sow again in Kentucky: Apr 2 · Apr 14 · Apr 26 · May 8 · May 20
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 Kentucky, 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 (Mar 16 – Apr 4). 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 Kentucky.
- 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 20 – Apr 30). 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 Kentucky’s average frost dates. More in the full arugula growing guide.
Arugula planting dates by USDA zone in Kentucky
Kentucky spans USDA zones 6a, 6b, 7a. 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 |
|---|---|---|
| Kentucky (this page) | April 18 | Mar 16 – Apr 4 |
| North Carolina | April 5 | Mar 3 – Mar 22 |
| South Carolina | March 25 | Feb 20 – Mar 11 |
| Georgia | March 25 | Feb 20 – Mar 11 |
| Tennessee | April 10 | Mar 8 – Mar 27 |
Questions gardeners in Kentucky ask
When is the best time to plant arugula in Kentucky?
Sow arugula in Kentucky between March 16 and April 4. That timing is set by Kentucky's average last spring frost of April 18.
Can I plant arugula in the fall in Kentucky?
Yes. For a fall crop, sow between August 29 and September 15, so the crop matures in cool weather before Kentucky's first frost around October 20.
When will arugula planted in Kentucky be ready to harvest?
Planted on time, arugula is usually ready from about April 20 to April 30, 30-40 days after sowing.
When is the last frost in Kentucky?
On average around April 18, with the first fall frost around October 20 - about 185 frost-free days. Your town may differ by two weeks or more.