Here is an article about hummers in ohio
ohio hummers You have mostly ruby throated hummingbirds but may see an occasional rufous. The rule of thumb is put out your feeders by mothers day in the
spring and leave them up until at least columbus day in october. Since you are in the north a nectar feeder would freeze solid in the winter.
Any
flowers you have nearby will help attract them in. Be sure to hang it within 10 feet or so of some sort of cover, ie bush or
tree, so they have a safe place in case a predator shows up.
It is
very important to keep your feeder clean. Change the nectar every 3 days in hot weather. In cooler weather every 5 days is ok. ONLY use 1 part white sugar to 4 parts water to make your nectar, or a commercially made mix.
Never use artificial sweeteners or honey. That will kill them. There is no need for red dye in the food.