I agree with all of the above. It has been a number of years since I lived in TN. But the weather was very mild until quite late and I was not as far south as Memphis. Even here where I am now one can plant that somethings like shrubs and trees that late though like Dave said October is really best. I have a beautiful river birch that we planted very late October a few years ago and it has done very well.
Happy Planting!!!
