Grey Alder vs Black Hawthorn - TreeTime.ca

Grey Alder vs Black Hawthorn

Crataegus douglasii

Alnus incana

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Black Hawthorn
Grey 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.

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.

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

Black Hawthorn Quick Facts

Grey Alder Quick Facts

Zone: 3a
Zone: 1a
Height: 8 m (25 ft)
Height: 8 m (25 ft)
Spread: 5 m (15 ft)
Spread: 4 m (12 ft)
Light: partial shade, full sun
Light: full sun
Moisture: any
Moisture: normal, wet
Growth rate: medium
Growth rate: fast
Life span: medium
Life span: short
Suckering: medium
Suckering: none


Foliage: contains thorns
Fall colour: yellow to red
Fall colour: yellow to orange
Bark: brown to gray
Flowers: white
Fruit: small catkins
Berries: purplish-black pomes
Cones: small brown cones
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


Native to: AB, BC, SK, ON
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Other Names: crataegus columbiana, douglas hawthorn, douglas' thornapple
Other Names: hoary alder, river alder, speckled alder