Alnus glutinosa

Black Alder

Tips for Homeowners:

Prune in early to the middle of winter when dormant when needed.  It will colonize if the suckers are allowed to exist.

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This is a nice tree for growing in moist or wet soils, is adored by wildlife and makes a great screen in areas where few other trees can survive.

  • Both male and female flowers and fruit
  • Fruit adds winter interest
  • Nitrogen fixing benefits other plants growing in the vicinity

Best used for naturalizing in low wet soils or dry poor soils.  Best in eastern and central Kansas.

Height: 40-60 ft
Spread: 20-40 ft
Zone: 3-7
Color: Brown, Purple, Red

Interesting Notes about Black Alder:

Black Alder is a fast-growing tree that prefers growing in moist to wet soils.  It is not a native, but can be found in large groups especially if the sites are disturbed.  The trees are monecious meaning they have both male and female flowers, but are not all that showy.  The fruit of both the female and male provide the most interest for both the onlooker and the wildlife by way of a small cone and catkins which do persist into winter.


Characteristics & Attributes

Attributes:

  • Mass Planting
  • Winter Interest
  • Fast Growing
  • Naturalizing
  • Great Foliage
  • Attractive fruit

Foliage Color:

  • Green

Exposure:

  • Full Sun
  • Partial Sun

Attracts Wildlife:

  • Attracts Songbirds

Critter Resistance:

  • Deer Resistant

Habit:

  • Upright

Soil Moisture:

  • Wet Soil/Wetlands
  • Moist, Well-Drained
  • Average Water