I don't know where in Tennessee you live but there are Whole Foods stores in Franklin, Nashville and Memphis.
Don't know how close you are to Huntsville, Alabama, there is a new organic store called Earth Fare. We went last Sunday and its a really good organic market, not as large as Whole Foods but I like it.
You can Google "organic food stores" in your area and I'm sure you could find something. I would NOT use garlic that has been irradiated, you might have to take an afternoon drive in order to get some organic but for me that is well worth it! I did notice that our Kroger market is has a small section of organic produce and every one and a while I'll find some at Walmart but I don't think I trust Walmart organics lol!