Description

Island oak is found on several of California’s Channel Islands and Guadalupe Island off of Baja, Mexico. It once was widespread on the mainland according to the fossil record. It is thought to have disappeared as California became warmer and drier. This oak grows in an upright vase shape, with gray bark and evergreen dark green leaves with s spiny margins. This attractive oak will thrive in sun or partial shade and soil of at least medium drainage. Occasional deep watering is sometimes recommended, although the Channel Islands receive little or no rainfall in the summer. Island oak is tolerant of temperatures down to 10F.