When to plant garlic 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). Garlic needs 240–270 days to mature, which is tight for a full-season planting there — see the note below.
When to plant garlic in Indiana: the short answer
For a spring planting, sow Oct 22 – Nov 8. Seeds germinate in soil from 32 to 75°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 garlic in Indiana, step by step
- Prepare the bed. It needs at least six to eight hours of direct sun a day and loose soil at least 12 inches deep, with a pH between 5.5 and 7.5. Dig in compost before planting.
- 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: onion maggot, onion thrips, stem nematode. Diseases and disorders: white rot, rust, basal rot.
- Harvest. Garlic takes 240-270 days to reach harvest. Plant cloves 2-4 weeks after the first fall frost, pointy end up, and mulch. Hardneck types need this cold period; softneck types suit mild-winter regions and braid well. Harvest the following summer when the lower leaves brown.
Figures come from our crop data; dates use Indiana’s average frost dates. More in the full garlic growing guide.
Garlic 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 garlic dates shift with them.
When to plant garlic in nearby states
Questions gardeners in Indiana ask
When is the best time to plant garlic in Indiana?
Plant garlic in Indiana between October 22 and November 8. That timing is set for fall, after Indiana's first frost (about October 11).
When will fall-planted garlic be ready in Indiana?
The following June to July. Garlic roots in fall, rests over winter and finishes in early summer - harvest when the lower leaves turn brown.
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.