Alternate Common Name: Black alder or common alder
Average Height: Black alder typically grow from 60 to 100 feet tall.
Average Width: A black alder tree canopy is typically about 25 ft in width.
Leaf Description: Black alder leaves are short-stalked and rounded . When young, they are slightly glutinous, but later become shiny dark green.
Bark Description: European alder bark is smoother with little bumps. Typically it's more gray than brown.
Twig Description: Bumpy, bendable twigs.
Flowering: European alder flowers are wind-pollinated catkins. Typically, they are red and dark brown in color.
Needle or Broadleaf: Broadleafed
Comments: The wood of European (black) alder is soft. White when first split, then turning to a pinkish tone. The wood is durable under water and is used for pilings. Black alder tree wood is also used to help produce smoked goods.
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…
Gypsy moth larvae defoliate trees leaving them weakened and vulnerable to secondary fungal and insect invaders. Gypsy moth will affect trees in natural settings, forest plantations, and urban environments, often defoliating thousands of trees in a single outbreak. More…
The forest tent caterpillar strips the foliage from trees, builds cocoons on the sides of buildings, and becomes messy when crawling on sidewalks, patios, and driveways where they are frequently squashed More…