Sweet corn planting calendar for USDA Zone 7b

Raleigh, Greensboro, Richmond, Knoxville, Memphis. Average last spring frost April 8, first fall frost October 22 — a 197-day frost-free season.

Zone fit: excellent

Sweet corn is well suited to Zone 7b. Standard planting dates work with minor adjustments for microclimates.

Key dates

Direct-seed outdoors

April 8 – April 29

Expected first harvest

June 29 – July 27

Fall planting window

July 23 – August 13

Fall harvest window

October 13 – November 10

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 7b

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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