Ohio has a mild climate, with U.S. hardiness zones of 5a to 6a. Certain micro-climates exist around the state, so growing seasons vary slightly. Plant seed potatoes in Ohio that mature in the time frame for your climate.
Early season varieties good for Ohio include superior and norland, which mature in 90 to 100 days and 80 to 90 days respectively. Planting four weeks before your expected frost date allows early harvesting of these potatoes.
The southern part of Ohio warms up a few weeks earlier than the northern areas. You can plant seed potatoes in Ohio as soon as the soil is dry in your area. Select a time when no rainfall is expected. This generally happens in mid-March for southern Ohio and late April for northern Ohio.
Potatoes are not without problems and late blight has affected Ohio when spring weather is extremely wet. Control late blight disease by selecting certified seed potatoes, properly drying the potatoes before planting and waiting until the soil is dry. Northern areas of Ohio still yield an abundant harvest even when delaying planting until mid-June.