Zone-wise it'll be fine, what you'll want to watch out for is overwatering. HCG in their catalog almost always lists the amount of annual rainfall that their plants can handle; in this case it can grow in 30-40 in/yr areas with care (with care means perfect drainage and don't water it a lot beyond what Mother Nature gives it once it's established). Looking at rainfall maps, it appears that much of TN gets more than 30-40 in/yr http://www.wrcc.dri.edu/pcpn/tn.gif If you've got a raised bed or an area with great drainage there's no harm in trying it if you really like it. Just make sure you plant it with other things that aren't going to want to be watered--once it's established if it gets watered much on top of the already too much rain that you typically get, it will not be happy.
There are some other systems out there--the American Horticultural Society has developed a system of heat zones, when you combine that with the USDA winter hardiness zones it can help give you a better idea of what will do well for you. http://www.ahs.org/pdfs/05_heat_map.pdf Unfortunately it can be hard to find the heat zone listings for particular plants. The best system is Sunset's zones--they take into account summer heat, winter cold, humidity, rainfall, and other climate variables. I can't think of any plants that Sunset has said were for my zone that I haven't been able to grow, while the USDA zones let me down on a regular basis. The Sunset zones are widely used in the west but haven't gained as much traction in the eastern part of the country even though they do have zones for the whole country. I'm not sure exactly where you are in TN, but they list this grass as being able to grow in Sunset zone 33, and there are parts of TN that are zone 33. http://plantfinder.sunset.com/sunset/plant-details.jsp?id=435
Info on Sunset zones, includes links to map & plant finder: http://www.sunset.com/garden/climate-zones/climate-zones-intro-us-map-00400000036421