SelecTree: Tree Detail
Photo Locations: UC Berkeley Botanic Garden - Berkeley, CA, Los Angeles County Arboretum - Arcadia, CA and Arnold Arboretum - Boston, MA
Makes dense mass from ground up. Requires deep watering. Hardy to 0 degrees F.
Native to Europe, North Africa, and Asia.
Additional Common Names
BLACK ALDER, COMMON ALDER
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.
Special Uses & Values
Cite this tree:
SelecTree. "Alnus glutinosa Tree Record." 1995-2018. Jun 24, 2018.
< https://selectree.calpoly.edu/tree-detail/alnus-glutinosa >