Populus grandidentata - Big-toothed Aspen

Big-toothed Aspen

Populus grandidentata

  • Open irregular crown with coarse spreading branches
  • Leaves are ovate with a serrated edge, green on top and whitish underneath
  • Dioecious: trees are either male or female, flowering before the leaves appear
  • Male flowers are reddish, female flowers are yellow, ripening in early spring
  • Female trees are messy, with 'cotton' drifting
  • Flowers are followed by egg-shaped seeds with long silky hairs attached
  • Fall foliage is a bright yellow
  • They also multiply by suckering, often producing stands of a single sex

ZONE:
3

COLOUR:
Brown

HEIGHT:
18-20 m

SPREAD:
8-10 m

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Growing and Maintenance Tips:


A good native selection for naturalizing or for park areas. Sawtooth Aspen is distinguished from its cousin, Trembling Aspen, by its heavily serrated leaves. However, summer leaves are sometimes different from spring leaves.

Additional Notes about Big-toothed Aspen:


Native to Ontario and parts of North America.

Larval host for many species of moths and butterflies, including the colourful Tiger Swallowtail. The woolly seeds are used by birds for nesting material.  Many birds and mammals eat the buds, leaves, and stems. The twigs and bark are an important food for beavers, who also use it for building their dams and lodges. 

Weird fact: the green inner bark can photosynthesize in early spring to feed the tree before the leaves appear.

Characteristics & Attributes


ATTRIBUTES:
Fall Color
Deciduous
FLOWERING TIME:
Spring
HABIT:
Rounded
FOLIAGE COLOR:
Green
Gray
Yellow
LANDSCAPE USES:
Naturalizing
Specimen
PH TOLERANCE:
Moderate (up to 7.5)