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River Alder vs Arrowwood

Alnus incana

Viburnum dentatum

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River Alder
Arrowwood

River Alder is a large shrub or small tree with a multi-stemmed, spreading habit. It is an excellent tree to plant if you want to stabilize the soil near rivers and creeks.

Unlike the other alder varieties, River Alder is attractive enough to be included in riverside plantings by municipal and provincial park organizations.

Arrowwood is a cold hardy, reliable, and vigorous shrub that can easily grow on difficult sites. Featuring an upright, rounded, and multi-stemmed form, this shrub produces creamy white flowers against a backdrop of deep green, serrated foliage.

The flowers give way to dark, blue berries that will attract wildlife to your yard. Depending on the plant, Arrowwood's striking fall color can range from yellow, red to reddish-purple.

Many use Arrowwood for naturalization or mass planting projects but, more commonly, you'll see this simple yet elegant shrub as a shrub border or planted on its own.

RIVER ALDER QUICK FACTS

ARROWWOOD QUICK FACTS

Zone: 1a
Zone: 2a
Height: 8 m (25 ft)
Height: 1.2 m (4 ft)
Spread: 4 m (12 ft)
Spread: 2.4 m (8 ft)
Moisture: normal, wet
Moisture: normal, wet
Light: full sun
Light: partial shade, full sun
Fuzz/fluff: yes
Catkins: yes
Fall colour: yellow to orange
Growth rate: fast
Growth rate: medium
Life span: short
Life span: medium
Suckering: none
Suckering: high