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Alnus glutinosa

Phonetic Spelling
AL-nus glu-ti-NO-sa
Description

Has naturalized along streams; tough adoptable plant; few pest problems; tolerates short term flooding; flower and fruiting best in full sun; easy to transplant; dislikes summer heat

 

Site: Sun to partial shade; range of soil types including wet, dry and infertile soil

Form: Pyramidal in youth; rounded crown with age; often multi-stemmed

Cultivars:
  • Imperalis
Tags:
#sun#deciduous#full sun#partial shade#tree#winter interest#rapid growth#dry soil#wet sites#flooding#grows fast#multistemmed#pest resistant#transplant
Cultivars:
  • Imperalis
Tags:
#sun#deciduous#full sun#partial shade#tree#winter interest#rapid growth#dry soil#wet sites#flooding#grows fast#multistemmed#pest resistant#transplant
  • Attributes:
    Genus:
    Alnus
    Species:
    glutinosa
    Family:
    Betulaceae
    Particularly Resistant To (Insects/Diseases/Other Problems):
    tough adoptable plant; few pest problems; tolerates short term flooding; easy to transplant; wet, infertile, or dry soil
    Dimensions:
    Height: 40 ft. 0 in. - 60 ft. 0 in.
    Width: 20 ft. 0 in. - 40 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Tree
    Leaf Characteristics:
    Deciduous
    Habit/Form:
    Multi-stemmed
    Pyramidal
    Rounded
    Growth Rate:
    Rapid
    Texture:
    Medium
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Drainage:
    Good Drainage
    Occasionally Wet
    Usda Plant Hardiness Zone:
    3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b
  • Fruit:
    Fruit Color:
    Brown/Copper
    Green
    Fruit Description:
    The cones can be green or brown (smaller than the male catkins).
  • Flowers:
    Flower Color:
    Brown/Copper
    Gold/Yellow
    Purple/Lavender
    Red/Burgundy
    Flower Inflorescence:
    Catkin
    Flower Bloom Time:
    Winter
    Flower Size:
    1-3 inches
    Flower Description:
    Flowers are 2 to 4 in. yellow-brown to red-brown or even red-purple catkins (male flowers). Female flowers on short purplish brown strobili which persist until winter. Male catkins can be dark purple/red (long and drooping down), while the female catkins look like miniature buds.
  • Leaves:
    Leaf Characteristics:
    Deciduous
    Leaf Color:
    Green
    Leaf Arrangement:
    Alternate
    Hairs Present:
    No
    Leaf Length:
    3-6 inches
    Leaf Description:
    This plant has 2 to 4.5 in. alternate, rounded, shiny, green leaves that have non-showy fall color. Leave can have Dasineura tortilis or Aceria nalepai.
  • Bark:
    Bark Color:
    Dark Brown
    Light Brown
    Bark Plate Shape:
    Irregular
    Bark Description:
    Bark has plates that can be long and nearly rectangular in shape while others are small.
  • Stem:
    Stem Is Aromatic:
    No
    Stem Description:
    Buds are alternate.
  • Landscape:
    Landscape Location:
    Naturalized Area
    Landscape Theme:
    Winter Garden
    Resistance To Challenges:
    Dry Soil
    Insect Pests
    Wet Soil