Hackberry*New Release* Common Hackberry (Celtis occidentalis) is native to extensive regions of central and eastern North America. It is one of the toughest native shade trees you can plant, adapting to an incredible variety of soil types from heavy clay to sandy loam with wide pH ranges. Growing 30 40 feet tall at maturity in zone 3 with a rounded, symmetrical crown and distinctive corky, warty bark that becomes more striking with age. Hackberry have small