Sweet Corn: Summer's Quintessential Treat

Nothing says summer like freshly harvested, lightly steamed ears of sweet corn.

About This Plant

Varieties include yellow, white, and bi-colored types. Because corn is wind-pollinated, plant in blocks of at least four rows, not long single rows. Plant early, mid, and late-season varieties to extend harvest over several weeks. Plant on the garden's north side to avoid shading other crops.

Site Selection

Select a site with full sun and well-drained soil. Loosen soil to 12–15 inches and mix in a 2- to 4-inch layer of compost and/or aged manure.

Planting Instructions

Direct-sow after all frost danger passes and soil reaches ~60°F. Corn needs ample nitrogen: work plenty of aged manure into soil the previous fall and plan to side-dress with nitrogen during the season if needed. Plant in blocks of at least four rows, 2–4 feet between rows, seeds 1½–2 inches deep, 6–8 inches apart.

Care

Thin to 12–16 inches apart when plants are 4–5 inches tall. Provide at least 1 inch of water weekly. Control weeds with frequent shallow cultivation until knee-high, then apply 3–5 inch mulch. Watch for nitrogen deficiency (yellowing leaves) and side-dress with fish emulsion or other nitrogen-rich fertilizer. Contact your extension office for corn earworm and European corn borer controls.

Harvesting

Harvest when ears are completely filled and a pierced kernel shows milky white liquid. Sweet corn (except supersweet types) loses sweetness quickly after harvest. Prepare for eating or preserving immediately after picking.