Watermelon planting calendar for USDA Zone 6b

Boone NC, northern VA, central KY, southern IN. Average last spring frost April 24, first fall frost October 8 — a 167-day frost-free season.

Zone fit: good

Watermelon is frost-tender, so timing the outdoor transplant to the last frost matters more here than in warmer zones. Row cover buys 2 weeks of head start.

Key dates

Start seeds indoors

March 27 – April 10

Direct-seed or transplant outdoors

May 8 – May 29

Expected first harvest

August 8 – September 5

Windows are calculated from your zone's average frost dates. Adjust ±1 week for microclimates, elevation, and your own frost records.

Spacing and soil

Plant spacing: 36″
Row spacing: 96″
Seed depth: 1″
Soil temperature: 75–95°F
Frost tolerance: tender
Days to harvest: 85 days

Grower notes for Zone 6b

Ripeness cue: tendril nearest the fruit turns brown and the ground spot yellows. Do not go by thumping alone.

Plant near: corn, radish

Keep away from: potatoes

Other cucurbits for Zone 6b

Same crop, other zones

Track your own plantings

BAU Farm Intelligence turns these windows into per-field tasks — indoor seed-start reminders, transplant dates, harvest projections — using your farm's actual frost history.

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