Ohio falls within USDA Plant Hardiness Zones 5a to 6b. These zones are characterized by their cold winters and moderate summers, making them suitable for a variety of plant species. Gardeners in Ohio should select plants that thrive in these conditions, considering factors like frost tolerance and heat resistance. It’s advisable to consult with local gardening resources or extension offices to determine the best planting times and suitable species for Ohio’s specific climate and soil conditions.