Black Hawthorn vs Sitka Alder - TreeTime.ca

Black Hawthorn vs Sitka Alder

Crataegus douglasii

Alnus alnobetula subsp. sinuata

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Black Hawthorn
Sitka Alder

Black Hawthorn is a versatile plant that is native to wetlands and other areas with moist soils, but can also tolerate dry soils. This plant can be grown as a short shrub, or a tree reaching 30 feet tall.

Black Hawthorn is valued for erosion control and attracting pollinators. It also makes an attractive flowering ornamental that can be planted as a specimen or pruned as a hedge. It is commonly used in shelterbelts.

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.

Black Hawthorn Quick Facts

Sitka Alder Quick Facts

Zone: 3a
Zone: 2a
Height: 8 m (25 ft)
Height: 5 m (15 ft)
Spread: 5 m (15 ft)
Spread: 3 m (10 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: any
Moisture: wet
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: medium


Foliage: contains thorns
Fall colour: yellow to red
Bark: brown to gray
Bark: redish-brown to grey, smooth
Flowers: white
Berries: purplish-black pomes
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


Native to: AB, BC, SK, ON
Native to: AB, BC, YT, NT
Other Names: crataegus columbiana, douglas hawthorn, douglas' thornapple
Other Names: wavy leaf alder