When to plant cantaloupes 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). Cantaloupe / Muskmelon needs 70–90 days to mature, which fits comfortably within Indiana's growing season.
When to plant cantaloupes in Indiana: the short answer
For a spring planting, plant out May 1 – May 18, with seeds started indoors Mar 27 – Apr 10. Wait until the soil is at least 70°F and frost is over.
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 cantaloupes in Indiana, step by step
- Start seeds indoors (Mar 27 – Apr 10). Sow seeds 1 inch deep in seed-starting mix under bright light. They take 4-10 days to sprout, fastest in soil around 85°F. Harden seedlings off for a week before they go outside.
- Prepare the bed. They need at least six to eight hours of direct sun a day and loose soil at least 18 inches deep, with a pH between 6.0 and 7.5. Dig in compost before planting.
- Plant out (May 1 – May 18). Space plants about 24 inches apart in rows 60 inches apart. It is killed by frost, so nothing goes outside until the danger has passed.
- 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: striped cucumber beetle, aphids, squash bug, squash vine borer. Diseases and disorders: powdery mildew, downy mildew, fusarium wilt, bacterial wilt.
- Harvest (from about Jul 17 – Aug 6). Cantaloupe / Muskmelon takes 70-90 days to reach harvest. Needs 70-90 warm days - start indoors in paper pots in short-season areas. Ripe when the fruit slips from the vine with a light tug and smells sweet at the blossom end. Ease off water as fruit ripens for sugar.
Figures come from our crop data; dates use Indiana’s average frost dates. More in the full cantaloupe / muskmelon growing guide.
Cantaloupe 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 cantaloupe / muskmelon dates shift with them.
When to plant cantaloupes in nearby states
Questions gardeners in Indiana ask
When is the best time to plant cantaloupes in Indiana?
Plant cantaloupe / muskmelon transplants outdoors in Indiana between May 1 and May 18. That timing is set by Indiana's average last spring frost of April 24.
When should I start cantaloupe / muskmelon seeds indoors in Indiana?
Start seeds indoors between March 27 and April 10, about 3 weeks before the last frost, so the seedlings are ready to plant out from May 1.
What is the latest I can plant cantaloupes in Indiana?
About August 2. Cantaloupes need at least 70 days to mature, and frost around October 11 ends the season, so later plantings risk being cut short.
When will cantaloupes planted in Indiana be ready to harvest?
Planted on time, cantaloupes are usually ready from about July 17 to August 6, 70-90 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.