Native shade tree - own root. Discovered at Select Trees by Dr. Dirr, Fortitude™ differs from other Willow Oak selections due to mid-spring leaf-out, protecting it from spring cold damage. Fortitude™ is much like Hightower® Willow Oak in form and texture, has a naturally developed central leader, uniform distribution of branches, and tolerance to a wide range of urban conditions throughout the Eastern United States.
Uniform, dense, dominant leader
Dark green, fine texture
Zone 6 to 9