Trembling Aspen
Populus tremuloides

Location in Ontario
Trembling Aspen grows throughout Ontario. It grows in any sunny open area.

Trembling Aspen grove in fall, University of Guelph Arboretum
Genus Populus
Poplars are fast growing trees with soft wood. The leaves are simple. Flowers are mostly dioecious and appear in early spring. Poplars are pioneer species which grow in a newly opened areas such as after a fire or when land is cleared. Some are successional trees along sand dunes.

In the Landscape
Trembling Aspen is medium-sized tree, growing up to 25 metres and 75 years of age. It is fast growing, and often used in rows, as windbreaks, on large properties and farms. It is often planted to help stabilize soil and prevent soil erosion. Poplars should not be planted near water lines, septic systems etc. since they produce many spreading roots.

Trembling Aspen is a pioneer species. They are the first trees to grow in a newly opened area; after a fire, or when land is cleared.

TREE FACT: Trembling Aspen is also called Quaking Aspen.

TREE FACT: In western North America, Trembling Aspen can live up to 200 years of age!

Trembling Aspen with seeds, Norfolk County

Leaves are simple and oval in shape with fine teeth along the edges. Leaves turn yellow to gold in the fall.
Young bark is smooth, waxy and pale green to almost white while old bark at the bottom of the tree is gray with flat-topped ridges.
Trempling Aspen is dioecious with male (pollen) flowers and female (seed) flowers occurring on different trees. Flowers are in catkins, and appear in the early spring before the leaves. Pollination is by wind.
The seeds are found in long catkins produced in the late spring. Seeds produce seedlings easily and quickly, provided there is enough moisture. Seeds are produced after 10 years of growth, every 4 to 5 years.

Trembling Aspen wood is light and soft.
Specific gravity: 0.38
Janka Hardness:
350 lb
Wood Comparison Chart

Trembling Aspen with flowers in early spring, Norfolk County

Link to United States Forest Service Silvics Manual for Trembling Aspen.