Trees for Tennessee Landscapes - Choosing the Right Tree
Plant high-quality stock to avoid future tree hazards associated with your tree. Planting poor stock will probably lead to more expense in the long run because of increased maintenance and a shorter life span. The best protocol is to purchase trees from a reputable nursery, establish careful specifications for your purchased tree and obtain a warranty for your tree.
"SP662 Guidelines for Buying Trees," The University of Tennessee Agricultural Extension Service, SP662-15M-9/05 R12-4910-051-007-06 06-0076, http://trace.tennessee.edu/utk_agexfores/61