www.seedlingsrus.com or call us at 215 651 8329 A handsome tree in many locations, the tree slowly reaches a height and spread of 20 to 30 feet. This tree will grow with an attractive open habit in total shade, but be dense in full sun. The muscle-like bark is smooth, gray and fluted. Ironwood has a slow growth rate and can be difficult to transplant from a field nursery (although 10-inch-diameter trees were moved with a 90-inch tree spade during the winter in USDA hardiness zone 8b with no ...