Trunk wounds and branch pruning wounds were made on 5 to 7 m tall white ashes, honey locusts, and pin oaks. The amount of healing of each wound and the amount of trunk growth of each tree were measured for 3 years. The rate of healing of wounds was directly correlated with radial growth of the tree. Elliptical wounds, originally 50 mm wide, on all 3 tree species, decreased in width each year by 2.6 mm per 1 mm radial growth. The single most important dimension of a wound affecting rate of healing was width. The variables of wound shape, facing direction, height, and type of wound dressing affected rate of healing little, if at all. Healing of wounds occurred during the season of the year when trunk growth occurred.