Monday, May 4, 2026

Question: What USDA plant hardiness zones are found in Ohio?

Answer: Zones 5, 6, and 7. Most of Ohio falls within Zones 6a or 6b, while parts of the state’s southern tip—around Lawrence County—are in Zone 7a, as are stretches along Lake Erie. A speck of Zone 5b can be found in Knox County.

The USDA Plant Hardiness Zone Map is the standard that gardeners and growers use to determine which perennial plants are most likely to thrive in a given location. The map is based on the average annual extreme minimum winter temperature.