Royal Purple Smokebush vs Mountain Alder - TreeTime.ca

Royal Purple Smokebush vs Mountain Alder

Alnus incana subsp. tenuifolia

Cotinus coggygria Royal Purple

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Mountain Alder
Royal Purple Smokebush

Mountain Alder is a native cold-hardy shrub or small tree often found along streams and in moist forested habitats. Its nitrogen-fixing ability enriches soils and supports surrounding vegetation, while its extensive root system helps stabilize streambanks and slopes. The fast growth rate allows it to establish quickly on disturbed sites, making it especially valuable in reclamation, restoration, and erosion control projects.

Often forming dense thickets, Mountain Alder enhances habitat quality in riparian and upland areas. It provides food and cover for various wildlife, including birds and small mammals. Recognized as an important species for soil and water conservation, it is well suited for riparian planting, naturalization, and ecological restoration.

Note: We use Sitka Alder for Alnus incana subsp. tenuifolia. This species is also known by many other common names, including Grey Alder, River Alder, and others. Please confirm the scientific name to ensure you are ordering the correct plant.

Royal Purple Smokebush is an attractive and dramatic shrub. Mid-summer you'll notice feathery, purple-pink puffs of airy seed clusters that give the illusion of smoke. The contrast of these seed clusters against deep purple-red foliage will make Royal Purple Smokebush your new favorite shrub.

It is tolerant of clay soil, drought, and deer, making Royal Purple Smokebush a hardy addition to any yard. Try it in a hedge, shrub border, or as an accent shrub; regardless of how you use it, this shrub will be a head turner.

Mountain Alder Quick Facts

Royal Purple Smokebush Quick Facts

Zone: 1a
Zone: 4a
Height: 6 m (20 ft)
Height: 3 m (10 ft)
Spread: 3 m (10 ft)
Spread: 5 m (15 ft)
Light: partial shade, full sun
Light: full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: medium
Growth rate: medium
Life span: medium
Life span: medium
Growth form: multi-stemmed, thicket-forming
Spreading: rhizomes - medium, seeds - low, layering - low
Suckering: low


Fall colour: Purple and scarlet red
Bark: smooth, gray to brown
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no


Native to: AB, BC, SK, YT, NT
Other Names: river alder, speckled alder, thin-leaved alder, thinleaf alder, western river alder