You might want to look up your hardiness zone here and put it in your profile with your state. Just put in Ohio zone *. Not everyone knows the climate conditions on Ohio, though I suspect you are zone 5.
Take a look at this site. Look to the left under 'Seeds' and you can click on 'Fragrant' for ideas.
Here's another great site to look around.
You might also want to do some reading here.
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.