When to plant swiss chard in Indiana
Indiana’s average last spring frost is April 24, and the first fall frost typically arrives around October 11 — about 170 frost-free days (USDA zones 5b, 6a, 6b). Swiss Chard needs 50–60 days to mature, which fits comfortably within Indiana's growing season.
When to plant swiss chard in Indiana: the short answer
For a spring planting, plant out Apr 3 – Apr 20, with seeds started indoors Mar 20 – Apr 3. 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 Indiana, step by step
- Start seeds indoors (Mar 20 – Apr 3). 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 (Apr 3 – Apr 20). 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 Indiana.
- 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 30 – Jun 9). 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 Indiana’s average frost dates. More in the full swiss chard growing guide.
Swiss Chard planting dates by USDA zone in Indiana
Indiana spans USDA zones 5b, 6a, 6b. 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
Questions gardeners in Indiana ask
When is the best time to plant swiss chard in Indiana?
Plant swiss chard transplants outdoors in Indiana between April 3 and April 20. That timing is set by Indiana's average last spring frost of April 24.
When should I start swiss chard seeds indoors in Indiana?
Start seeds indoors between March 20 and April 3, about 4 weeks before the last frost, so the seedlings are ready to plant out from April 3.
Can I plant swiss chard in the fall in Indiana?
Yes. For a fall crop, sow between July 23 and August 9, so the crop matures in cool weather before Indiana's first frost around October 11.
When will swiss chard planted in Indiana be ready to harvest?
Planted on time, swiss chard is usually ready from about May 30 to June 9, 50-60 days after planting.
When is the last frost in Indiana?
On average around April 24, with the first fall frost around October 11 - about 170 frost-free days. Your town may differ by two weeks or more.