When to plant swiss chard 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). Swiss Chard needs 50–60 days to mature, which fits comfortably within Kentucky's growing season.
When to plant swiss chard in Kentucky: the short answer
For a spring planting, plant out Mar 28 – Apr 14, with seeds started indoors Mar 14 – Mar 28. Seeds germinate in soil from 40 to 85°F.
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 swiss chard in Kentucky, step by step
- Start seeds indoors (Mar 14 – Mar 28). Sow seeds 0.75 inch deep in seed-starting mix under bright light. They take 5-14 days to sprout, fastest in soil around 70°F. Harden seedlings off for a week before they go outside.
- 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 12 inches deep, with a pH between 6.0 and 7.5. Dig in compost before planting.
- Plant out (Mar 28 – Apr 14). Space plants about 9 inches apart in rows 18 inches apart. It tolerates a light frost but not a hard freeze. 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: leaf miner, aphids, flea beetle. Diseases and disorders: cercospora leaf spot, downy mildew.
- Harvest (from about May 24 – Jun 3). Swiss Chard takes 50-60 days to reach harvest. One of the most heat-tolerant leafy greens - a single spring sowing usually carries through summer into fall if kept picked.
Figures come from our crop data; dates use Kentucky’s average frost dates. More in the full swiss chard growing guide.
Swiss Chard 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 swiss chard dates shift with them.
When to plant swiss chard in nearby states
| State | Last frost | Plant out |
|---|---|---|
| Kentucky (this page) | April 18 | Mar 28 – Apr 14 |
| North Carolina | April 5 | Mar 15 – Apr 1 |
| South Carolina | March 25 | Mar 4 – Mar 21 |
| Georgia | March 25 | Mar 4 – Mar 21 |
| Tennessee | April 10 | Mar 20 – Apr 6 |
Questions gardeners in Kentucky ask
When is the best time to plant swiss chard in Kentucky?
Plant swiss chard transplants outdoors in Kentucky between March 28 and April 14. That timing is set by Kentucky's average last spring frost of April 18.
When should I start swiss chard seeds indoors in Kentucky?
Start seeds indoors between March 14 and March 28, about 4 weeks before the last frost, so the seedlings are ready to plant out from March 28.
Can I plant swiss chard in the fall in Kentucky?
Yes. For a fall crop, sow between August 1 and August 18, so the crop matures in cool weather before Kentucky's first frost around October 20.
When will swiss chard planted in Kentucky be ready to harvest?
Planted on time, swiss chard is usually ready from about May 24 to June 3, 50-60 days after planting.
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.