I just scraped a redbud with my mower wheel, peeling back a piece of the bark about 6 inches high and 3 inches wide. The edge of the piece is still intact attached to the tree. the tree is a few years old, about 10 to 15 feet high and the trunk's diameter is about 4 inches. I saw one suggestion on the web to place the bark back where it was peeled from and to wrap it with duct tape, left in place for a year or so. Any suggestions? Thanks, Pete