When to plant watermelons in North Carolina
North Carolina’s average last spring frost is April 5, and the first fall frost typically arrives around October 25 — about 203 frost-free days (USDA zones 5b, 6a, 6b, 7a, 7b, 8a, 8b). Watermelon needs 70–100 days to mature, which fits comfortably within North Carolina's growing season.
North Carolina covers a wide range of climates, so your exact frost dates may differ from the state average by two weeks or more. For dates tuned to your town, use the calendar generator.
When to plant watermelons in North Carolina: the short answer
For a spring planting, plant out Apr 12 – Apr 29, with seeds started indoors Mar 8 – Mar 22. 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 watermelons in North Carolina, step by step
- Start seeds indoors (Mar 8 – Mar 22). 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 24 inches deep, with a pH between 5.5 and 6.8. Dig in compost before planting.
- Plant out (Apr 12 – Apr 29). Space plants about 36 inches apart in rows 72 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 vine borer. Diseases and disorders: anthracnose, fusarium wilt, powdery mildew, gummy stem blight.
- Harvest (from about Jun 28 – Jul 28). Watermelon takes 70-100 days to reach harvest. Longest-season cucurbit here - icebox varieties (70-75 days) are the realistic choice north of the mid-Atlantic. Ripe when the curly tendril nearest the fruit is brown and dry and the ground spot is buttery yellow.
Figures come from our crop data; dates use North Carolina’s average frost dates. More in the full watermelon growing guide.
Watermelon planting dates by USDA zone in North Carolina
North Carolina spans USDA zones 5b, 6a, 6b, 7a, 7b, 8a, 8b. 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 watermelon dates shift with them.
When to plant watermelons in nearby states
| State | Last frost | Plant out |
|---|---|---|
| North Carolina (this page) | April 5 | Apr 12 – Apr 29 |
| South Carolina | March 25 | Apr 1 – Apr 18 |
| Georgia | March 25 | Apr 1 – Apr 18 |
| Tennessee | April 10 | Apr 17 – May 4 |
| Kentucky | April 18 | Apr 25 – May 12 |
Questions gardeners in North Carolina ask
When is the best time to plant watermelons in North Carolina?
Plant watermelon transplants outdoors in North Carolina between April 12 and April 29. That timing is set by North Carolina's average last spring frost of April 5; North Carolina spans several climates, so cooler and higher parts of the state run later.
When should I start watermelon seeds indoors in North Carolina?
Start seeds indoors between March 8 and March 22, about 3 weeks before the last frost, so the seedlings are ready to plant out from April 12.
What is the latest I can plant watermelons in North Carolina?
About August 16. Watermelons need at least 70 days to mature, and frost around October 25 ends the season, so later plantings risk being cut short.
When will watermelons planted in North Carolina be ready to harvest?
Planted on time, watermelons are usually ready from about June 28 to July 28, 70-100 days after planting.
When is the last frost in North Carolina?
On average around April 5, with the first fall frost around October 25 - about 203 frost-free days. Your town may differ by two weeks or more.