Average Height: Blackjack oak is a small tree, generally 20-30 feet tall.
Average Width: No data
Leaf Description: Leaves are 5-8 inches long, appearing thick with three shallow lobes, each ending in a bristle tip. The upper surface is a shiny green color, the underside appears to be covered in orange brown hairs.
Bark Description: Blackjack oak tree bark is very dark - almost black - and rough.
Twig Description: Blackjack oak trees have stout, dark brown twigs with reddish brown buds that are sharp, and fuzzy.
Aphids are one of the most common insects found on trees and shrubs. There are more than 400 species of aphids that feed on numerous hosts, creating sticky honeydew that can coat any surface underneath the tree or plant that is infested. More…
Oak anthracnose is a foliar fungal disease, Apiognomonia quercina that causes darkened spots and lesions on infected leaves. Although unsightly, anthracnose is rarely harmful to the tree’s health, however if infection is severe repeated defoliation can reduce the tree’s resources, … More…