Root Vegetable

When to Plant Sweet Potatoes in Ohio

Not related to regular potatoes at all. Sweet potatoes need heat and a long growing season but reward with incredible harvests.

The Short Answer

Sweet potatoes are a stretch in Ohio — the crop needs 90-120 days of warm soil and warm air, pushing the limits of Ohio's growing season. But southern Ohio gardeners (Zone 6b) who use black plastic mulch and start with well-rooted slips can produce a respectable harvest of one of America's most nutritious vegetables.

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

Sweet Potatoes Planting Schedule for Ohio

Northern Ohio (Zones 5b, 6a)

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

Start Seeds Indoors
8 wks before frost
Transplant Outside
3 wks after frost

Central Ohio (Zones 6a, 6b)

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

Start Seeds Indoors
8 wks before frost
Transplant Outside
3 wks after frost

Southern Ohio (Zones 6b)

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

Start Seeds Indoors
8 wks before frost
Transplant Outside
3 wks after frost

Growing Sweet Potatoes in Ohio

State-Specific Growing Tips

Plant slips (not seeds or tubers) 3 weeks after last frost when soil reaches 65°F — typically early June. Black plastic mulch is essential for warming Ohio's clay soil. Raised beds improve drainage and soil temperature. Sweet potatoes need loose, well-drained soil — Ohio's heavy clay must be heavily amended. Harvest before the first frost — even light frost damages sweet potato tubers. Cure in warmth (80-85°F) for 10 days after harvest.

Recommended Varieties for Ohio

Beauregard (90 days, the most reliable for shorter seasons). Covington (90 days). Bush Porto Rico (110 days, compact vine). Ohio State Extension notes sweet potatoes are marginal north of Columbus.

Common Challenges in Ohio

Insufficient season length in northern Ohio. Cool soil temperatures slow growth. Sweet potato weevil is not common in Ohio but is present in the Southeast. Deer browse the vines. Voles tunnel under mulch and damage tubers.

Growing Tips

Grow from slips, not seeds. Start slips from a sweet potato in water 8 weeks before transplanting. Cure harvested tubers in warmth for 10 days.

Companion Planting

Plant sweet potatoes alongside these companions for better growth:

Beans Corn

Keep sweet potatoes away from:

Squash

The Bottom Line

Sweet Potatoes 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

Sweet Potatoes Growing Guide National planting guide with all states Ohio Planting Calendar All plants for Ohio Sweet Potatoes in Alabama Alabama planting dates Sweet Potatoes in Alaska Alaska planting dates Sweet Potatoes in Arizona Arizona planting dates Sweet Potatoes 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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