Royal Purple Smokebush vs Sitka Alder - TreeTime.ca

Royal Purple Smokebush vs Sitka Alder

Alnus alnobetula subsp. sinuata

Cotinus coggygria Royal Purple

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Sitka Alder
Royal Purple Smokebush

Sitka Alder is a native deciduous shrub or small tree that often forms dense thickets. Its extensive root system stabilizes slopes and streambanks. Nitrogen-fixing capabilities and nutrient-rich leaf litter improve soil fertility, creating better growing conditions for surrounding plants. These qualities make it especially effective in disturbed or erosion-prone sites.

Often found in moist, high-elevation mountain environments, Sitka Alder also enhances habitat by providing cover and structure in both riparian and upland areas. Birds and small mammals utilize it for nesting, and its seeds serve as a food source.

Note: We use Sitka Alder for Alnus alnobetula subsp. sinuata. This species is also known by many other common names, including Mountain Alder, Green 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.

Sitka Alder Quick Facts

Royal Purple Smokebush Quick Facts

Zone: 2a
Zone: 4a
Height: 5 m (15 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: wet
Moisture: dry, normal
Growth rate: medium
Growth rate: medium
Life span: medium
Life span: medium
Growth form: upright to prostrate, thicket-forming
Spreading: seed - medium, layering - medium
Suckering: low


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


Native to: AB, BC, YT, NT
Other Names: wavy leaf alder