The time to plant, and which variety of rose will succeed in your Ohio rose garden, depends on whether you live in north or south Ohio. Hybrid tea roses, for instance, require winter protection in northern Ohio, but not in the south. The time to prune a rose bush is the same, though, for all Ohio gardeners.
Rose bushes require pruning for a number of reasons, chief among them is to clear out overgrowth to allow for better air circulation within the plant. Roses are susceptible to fungal diseases that thrive when air circulation within the plant is impeded.
Ask any number of rosarians how to prune a rose bush and you will get that many different answers. There is no one "right" way to prune. At the least, prune to thin the growth in the middle of the plant. Cut branches that cross over one another and prune to keep the plant to the size you desire.
Prime rose pruning times in Ohio gardens are during March and into early April. Heirloom roses, also known as old garden roses, should be pruned immediately after they finish blooming.