Spring Gardening In Ohio: Planting Dates, Lawn Care And Other Tips To Know ️🌳

It's officially spring, and with warmer weather approaching, some Cincinnati gardeners can't wait to get out and plant.

But not very fast. According to The Old Farmer's Almanac, most seeds should not be planted or transplanted outdoors in Greater Cincinnati until late April or after the last frost threat has passed.

So when is the last frost? How important is the Ohio Plant Hardiness Zone? For a closer look at when to plant, we've answered some of the most common questions about spring gardening in Ohio.

Find the answers below and plant with pleasure.

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When is the last frost in Ohio?

According to the Almanac, the last average spring frost in Greater Cincinnati falls on April 23rd. It's April 27th in Columbus and April 14th in Cleveland.

To find the latest snow in your area, enter your location in the Almanac Snow History Directory at almanac.com.

What zone of stability is Ohio in?

Most of Ohio falls within plant hardiness zone 6a, according to the USDA. Some places are marked with zones 6B and 5B.

Plant hardiness zones help determine if a plant will grow in your climate. Compare your location with the location on the plant care map. Zones are based on average annual minimum winter temperatures as listed by the National Oceanic and Atmospheric Administration.

Use the USDA interactive map at planthardiness.ars.usda.gov to find the plant hardiness zone in your area.

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When to Plant Tomatoes and Other Crops in Ohio

According to The Ohio State University College of Food, Agricultural, and Environmental Sciences, tomatoes should be planted after the last frost. The best landing time in central Ohio is May 20th. It's a week or two earlier in southern Ohio and a week later in northern Ohio.

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For information on when to plant other crops, see the 2023 Almanac Planting Calendar at almanac.com.

When to Plant Hydrangeas in Ohio

According to HGTV, hydrangeas should be planted in late spring, after the last frost, or early fall, at least six weeks before the first frost. The first fall frost in Cincinnati is October 20.

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When to Fertilize Lawns in Ohio

According to Ohio State University assistant professor Mike Hogan, lawn fertilizer should be applied three times a year as needed: late spring, late summer, and late fall. Spring is the best time to control knotweed and other lawn weeds.

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The OSU extension recommends waiting until autumn to plant bare grass.