How to Grow Sweet Corn (2026)
Wind-pollinated; plant in blocks, not rows.
Quick answer: Sweet Corn is a warm-season crop for zones 3–11 in full sun. Plant after the last frost, space 12″ apart, and expect harvest in about 80 days.
Build your Sweet Corn planting card
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In Alabama (zone 7–9, last frost ≈ Mar 15, first frost ≈ Nov 15, 245-day season), your Sweet Corn plan:
Wind-pollinated; plant in blocks, not rows. Suits USDA zones 3–11. Dates are typical; confirm with your county extension and the 10-day forecast.
Growing tips
- Spacing: 12 inches between plants keeps air flowing and limits disease.
- Depth: sow seeds about 1.5″ deep (or set transplants at the same soil line).
- Sun: Full sun (6+ hours).
- Season: Wait until nights stay above 55°F and soil is warm.
More warm-season crops
Spacing, depth, and days-to-harvest are typical values from university extension guides. Planting dates are computed from typical USDA/extension freeze dates (USDA Plant Hardiness Zone Map (2023) + state cooperative extension typical freeze dates); confirm locally before acting.