Warm-Season Vegetable

When to Plant Corn (Sweet) in Indiana

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

The Short Answer

In Indiana, corn (sweet) planting dates vary by region. In Northern Indiana, your average last frost is around Apr 25 - May 10, while Southern Indiana sees its last frost around Apr 10 - Apr 25. Since corn (sweet) are frost-sensitive, direct sow 2 weeks after your last frost date. Clay-heavy soils common statewide. Rich but can have drainage issues. Raised beds help with heavy clay.

Indiana Frost Dates

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

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

Corn (Sweet) Planting Schedule for Indiana

Northern Indiana (Zones 5b, 6a)

Average last frost: Apr 25 - May 10 · Average first frost: Oct 1 - Oct 15

Direct Sow
2 wks after frost

Central Indiana (Zones 6a, 6b)

Average last frost: Apr 15 - May 1 · Average first frost: Oct 10 - Oct 25

Direct Sow
2 wks after frost

Southern Indiana (Zones 6b)

Average last frost: Apr 10 - Apr 25 · Average first frost: Oct 15 - Nov 1

Direct Sow
2 wks after frost

Growing Corn (Sweet) in Indiana

Corn (Sweet) in Indiana's Climate

Your climate is classic corn country. Direct sow from mid-May. Succession plant through late June for harvests from July through September. Moderate summer temperatures produce long-lasting ears without the heat stress that shortens quality in southern states. European corn borer and corn earworm are the primary pests.

Soil Considerations for Indiana

Clay-heavy soils common statewide. Rich but can have drainage issues. Raised beds help with heavy clay. Make sure soil has warmed to at least 60°F before planting corn (sweet) outside.

Indiana Climate & Growing Season

Four seasons. Hot, humid summers. Adequate rainfall for most crops. Occasional late spring frosts catch gardeners off guard. Corn (Sweet) cannot tolerate any frost, so wait until all frost danger has passed before transplanting outside. Watch local forecasts carefully in spring.

Growing season length varies across Indiana: Northern Indiana (5b, 6a) has a last frost around Apr 25 - May 10, while Southern Indiana (6b) sees frost end around Apr 10 - Apr 25. This difference matters for corn (sweet) — transplant timing shifts by several weeks across the state.

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 across Indiana, but your exact planting dates depend on which region you're in. Northern Indiana gardeners should plan around a Apr 25 - May 10 last frost, while those in Southern Indiana can typically plant earlier. 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 Indiana Planting Calendar All plants for Indiana 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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