Warm-Season Vegetable

When to Plant Corn (Sweet) in Ohio

Nothing says summer like fresh sweet corn. Plant in blocks (not rows) for proper pollination.

The Short Answer

Sweet corn is a quintessential Ohio summer crop — the roadside stands that line rural highways from July through September are an Ohio institution. Ohio's rich prairie-derived soils in the western part of the state produce outstanding corn, and even the clay soils of the east grow it well with proper fertility. The key is patience: corn needs warm soil and warm nights, making it one of the last crops to plant.

Ohio Frost Dates

Your planting dates depend on which part of Ohio you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Northern Ohio 5b, 6a May 1 - May 15 Oct 1 - Oct 15
Central Ohio 6a, 6b Apr 20 - May 5 Oct 10 - Oct 25
Southern Ohio 6b Apr 15 - Apr 30 Oct 15 - Oct 30

Corn (Sweet) Planting Schedule for Ohio

Northern Ohio (Zones 5b, 6a)

Average last frost: May 1 - May 15 · Average first frost: Oct 1 - Oct 15

Direct Sow
2 wks after frost

Central Ohio (Zones 6a, 6b)

Average last frost: Apr 20 - May 5 · Average first frost: Oct 10 - Oct 25

Direct Sow
2 wks after frost

Southern Ohio (Zones 6b)

Average last frost: Apr 15 - Apr 30 · Average first frost: Oct 15 - Oct 30

Direct Sow
2 wks after frost

Growing Corn (Sweet) in Ohio

State-Specific Growing Tips

Direct sow 2 weeks after last frost when soil reaches 60°F — typically late May in most of Ohio. Plant in blocks of at least 4×4 (not single rows) for wind pollination. Corn is a heavy nitrogen feeder — amend with composted manure or high-nitrogen fertilizer at planting and side-dress when stalks are knee-high. Ohio's summer thunderstorms can flatten tall corn — plant in a sheltered location if possible and hill soil around bases when plants are 12 inches tall.

Recommended Varieties for Ohio

Silver Queen and Incredible for classic bicolor sweet corn. Peaches and Cream is an Ohio favorite. For super-sweet types, Honey Select and Xtra-Tender. Early varieties (60-65 days): Early Sunglow for northern Ohio's shorter season. Ohio State Extension recommends succession planting every 2 weeks through late June.

Common Challenges in Ohio

Corn earworm is the primary pest — the caterpillars bore into ear tips. Apply a drop of mineral oil to silk tips once silk appears. Raccoons devastate corn just before harvest — electric fencing is the only reliable deterrent. European corn borer tunnels into stalks. Smut (gray-black fungal growths on ears) appears occasionally — remove and destroy infected ears.

Growing Tips

Plant in blocks of at least 4x4 for wind pollination. Corn is a heavy feeder — amend soil with compost before planting.

Companion Planting

Plant corn (sweet) alongside these companions for better growth:

Beans Squash Melons

Keep corn (sweet) away from:

Tomatoes

The Bottom Line

Corn (Sweet) can be grown successfully in Ohio with proper attention to regional frost dates and local growing conditions. Timing varies across the state — Northern Ohio gardeners work with a last frost around May 1 - May 15, while Southern Ohio sees frost end around Apr 15 - Apr 30. Choose varieties suited to your region, amend your soil based on its specific needs, and monitor for the pests and diseases most common in your area. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Corn (Sweet) Growing Guide National planting guide with all states Ohio Planting Calendar All plants for Ohio Corn (Sweet) in Alabama Alabama planting dates Corn (Sweet) in Alaska Alaska planting dates Corn (Sweet) in Arizona Arizona planting dates Corn (Sweet) in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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