thinleaf alder tree arboradvisor of colorado
trunk of a thinleaf alder tree arboradvisor of colorado
thinleaf alder tree arboradvisor of colorado
fruit of a thinleaf alder tree arboradvisor of colorado
leaves of a thinleaf alder tree arboradvisor of colorado
thinleaf alder tree arboradvisor of colorado
thinleaf alder tree arboradvisor of colorado

Thinleaf Alder

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Alnus tenuifolia

The Thinleaf Alder is a native Colorado tree with dark green foliage that turns yellow in fall. In the spring it has flower clusters before its leaves emerge. It is a small to medium size tree with smooth grey bark even in old age (60 years). It has reddish bark and small cone-like seeds in fall and winter. This tree has an upright habit and does well in moist soils. It has been known to have some stump suckers which shoot up around the tree, but no so many as to be problematic. This tree comes in either single stem or multi-stem "clump" (most common) form.

This is an extremely hardy small tree well-suited to difficult wet sites. It's not particularly striking, but it is a neat, clean choice for landscape purposes.

Mature Height: 15-20 feet
Mature Width: 12-14 feet
Hardy to -50°F
Maximum Elevation: 10,000 Feet