Alnus, Siberian Alder 'Prairie Horizon®' (Large)

Prairie Horizon® Alder | Alnus hirsuta 'Harbin'

Height:  40 feet

Spread:  30 feet

Sunlight: full sun to full shade

Hardiness Zone:  4a

Other Names:  Siberian Alder

Description:

A handsome tree with strong upright growth, dark green foliage and smooth gray beech-like bark, purple catkins and clusters of brown cone-like strobiles add interest during winter; one of the most drought tolerant alders on the market

Ornamental Features

Prairie Horizon® Alder has purple catkins hanging below the branches in early spring before the leaves. It has dark green deciduous foliage. The glossy oval leaves turn yellow in fall. The smooth gray bark adds an interesting dimension to the landscape.

Landscape Attributes

Prairie Horizon® Alder is a deciduous tree with a strong central leader and an upright spreading habit of growth. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.

This tree will require occasional maintenance and upkeep, and is best pruned in late winter once the threat of extreme cold has passed. It has no significant negative characteristics.

Prairie Horizon® Alder is recommended for the following landscape applications;

• Shade
• Naturalizing And Woodland Gardens

Planting & Growing

Prairie Horizon® Alder will grow to be about 40 feet tall at maturity, with a spread of 30 feet. It has a low canopy with a typical clearance of 5 feet from the ground, and should not be planted underneath power lines. It grows at a fast rate, and under ideal conditions can be expected to live for 80 years or more.

This tree performs well in both full sun and full shade. It is an amazingly adaptable plant, tolerating both dry conditions and even some standing water. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This is a selected variety of a species not originally from North America.