Sweet corn 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
Sweet corn 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

Direct-seed outdoors
April 24 – May 15
Expected first harvest
July 15 – August 12
Fall planting window
July 9 – July 30
Fall harvest window
September 29 – October 27

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
12″
Row spacing
30″
Seed depth
1.5″
Soil temperature
65–85°F
Frost tolerance
tender
Days to harvest
75 days

Grower notes for Zone 6b

Plant in blocks of 4+ rows for wind pollination. Isolate super-sweet varieties from standard varieties by 250 ft or 14 days.

Plant near: beans, squash, cucumbers

Keep away from: tomatoes

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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