Common Hackberry vs Grey Alder - TreeTime.ca

Common Hackberry vs Grey Alder

Celtis occidentalis

Alnus incana

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Common Hackberry
Grey Alder

The Common Hackberry is a medium-sized deciduous tree that resembles the American Elm but is immune to Dutch Elm Disease. They are versatile and can adapt to a variety of growing conditions.

It produces purple-red, berry-like fruit with a large seed in the center. Both the sweet flesh, which tastes similar to dates, and the crunchy seed are edible. The fruit remains on the tree throughout the winter, offering a valuable food source for birds and other wildlife.

The Common Hackberry can also be a great addition to a pollinator garden. The tree itself is a host for the larvae of several butterfly species and the flowers provide a source of pollen and nectar.

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.

Common Hackberry Quick Facts

Grey Alder Quick Facts

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Zone: 2b
Zone: 1a
Height: 25 m (82 ft)
Height: 8 m (25 ft)
Spread: 7 m (24 ft)
Spread: 4 m (12 ft)
Light: full sun
Light: full sun
Moisture: any
Moisture: normal, wet
Growth rate: medium
Growth rate: fast
Life span: long
Life span: short
Suckering: high
Suckering: none


Fall colour: yellow to orange
Fruit: small catkins
Berries: black, edible
Flavor: sweet
Harvest: late fall to winter
Cones: small brown cones
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


Native to: MB, ON, QC
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Other Names: american hackberry, beaverwood, false elm, nettle tree, northern hackberry
Other Names: hoary alder, river alder, speckled alder