SelecTree: Tree Detail

BLACK ALDER
Alnus glutinosa

Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa Alnus glutinosa

Photo Locations: UC Berkeley Botanic Garden - Berkeley, CA, Los Angeles County Arboretum - Arcadia, CA and Arnold Arboretum - Boston, MA

General Notes

Makes dense mass from ground up. Requires deep watering. Hardy to 0 degrees F.

Native to Europe, North Africa, and Asia.

Family: Betulaceae

Additional Common Names

BLACK ALDER, COMMON ALDER

Tree Characteristics

Erect or Spreading and requires ample growing space.

Oval or Rounded Shape.

Has Deciduous foliage.

Height: 70 - 80 feet.

Width: 30 feet.

Growth Rate: 36 Inches per Year.

Longevity 40 to 150 years.

Leaves Round to Ovate, Dark Green, Bronze or No Change, Deciduous.

Flowers Inconspicuous. Green or Yellow. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).

Prolific, Brown Cone, Medium (0.50 - 1.50 inches), fruiting in Fall, Winter or Summer.

Bark Dark Gray, Fibrous.

Shading Capacity Rated as Dense in Leaf.

Shading Capacity Rated as Dense out of Leaf.

Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 1 - 10 and 14 - 24.

USDA Hardiness Zones 3 - 7.

Exposure Full Sun.

Wet to Moist Soil.

Clay, Loam or Sand Texture.

Highly Acidic to Slightly Alkaline Soil pH.

Salinity Tolerance is Coastal Good.

Seaside Tolerance is Good in Mild Zone and Medium in Moderate Zone.

Pests & Disease Information

Susceptible to Aphids, Powdery Mildew.

Health, Safety & Environmental Concerns

Branch Strength Rated as Medium Weak

Root Damage Potential Rated as High.

Allergy Health Hazard.

Desirable Wildlife Plant.

Attracts Birds.

Deer Palatable.

Special Uses & Values

Riparian.

Cite this tree:
SelecTree. "Alnus glutinosa Tree Record." 1995-2018. Jun 24, 2018.
< https://selectree.calpoly.edu/tree-detail/alnus-glutinosa >

This tree is not part of the SelecTree Nursery Connection. If you would like to see this tree listed, or know of a nursery that sells it, please contact us at ufei@calpoly.edu.