When to plant sweet corn 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). Sweet Corn needs 60–100 days to mature, which fits comfortably within Kentucky's growing season.
When to plant sweet corn in Kentucky: the short answer
For a spring planting, sow Apr 20 – May 9. Wait until the soil is at least 55°F and frost is over.
Succession sow again in Kentucky: May 9 · May 23 · Jun 6 · Jun 20 · Jul 4 · Jul 18 · Aug 1
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 sweet corn in Kentucky, step by step
- Prepare the bed. It needs at least six to eight hours of direct sun a day and loose soil at least 24 inches deep, with a pH between 5.8 and 7.0. Dig in compost before planting.
- Sow outdoors (Apr 20 – May 9). Space plants about 10 inches apart in rows 30 inches apart, sowing seed 1.5 inches deep. It is killed by frost, so nothing goes outside until the danger has passed.
- Water and feed. It needs plenty of water; keep the soil evenly moist and never let it dry out.
- Watch for pests and problems. Pests: corn earworm, European corn borer, corn rootworm, raccoons. Diseases and disorders: common smut, common rust, Stewart's wilt.
- Harvest (from about Jun 24 – Aug 3). Sweet Corn takes 60-100 days to reach harvest. Plant in a block of at least 4 short rows, not one long row, or the ears fill unevenly. Keep sugar-enhanced and supersweet types isolated from field corn. Succeed by sowing every 2 weeks or planting early/mid/late varieties together.
Figures come from our crop data; dates use Kentucky’s average frost dates. More in the full sweet corn growing guide.
Sweet Corn 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 sweet corn dates shift with them.
When to plant sweet corn in nearby states
| State | Last frost | Sow |
|---|---|---|
| Kentucky (this page) | April 18 | Apr 20 – May 9 |
| North Carolina | April 5 | Apr 7 – Apr 26 |
| South Carolina | March 25 | Mar 27 – Apr 15 |
| Georgia | March 25 | Mar 27 – Apr 15 |
| Tennessee | April 10 | Apr 12 – May 1 |
Questions gardeners in Kentucky ask
When is the best time to plant sweet corn in Kentucky?
Sow sweet corn in Kentucky between April 20 and May 9. That timing is set by Kentucky's average last spring frost of April 18.
What is the latest I can plant sweet corn in Kentucky?
About August 21. Sweet corn needs at least 60 days to mature, and frost around October 20 ends the season, so later plantings risk being cut short.
When will sweet corn planted in Kentucky be ready to harvest?
Planted on time, sweet corn is usually ready from about June 24 to August 3, 60-100 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.