Showy Mountain Ash vs Black Locust - TreeTime.ca

Showy Mountain Ash vs Black Locust

Sorbus decora

Robinia pseudoacacia

COMING SOON

(new stock expected: fall of 2025)

COMING SOON

(new stock expected: fall of 2025)

Showy Mountain Ash
Black Locust

Showy Mountain Ash is a hardy accent tree. It features pretty clusters of white flowers in spring followed by bright scarlet berries lasting into winter.

Great for small landscapes, Showy Mountain Ash is adaptable to both dry and moist locations, and it is suitable for average home landscape conditions.

Black Locust is an attractive tree. Its distinctive leaves are made of about a dozen bright green leaflets. It also notable for its fragrant white flowers, which smell of citrus.

Black Locust can grow in many situations, but prefers dry areas with lots of sun. It is robust and is an excellent choice for establishing shade in dry, open areas.

Important note: Much of the Black Locust is toxic to humans and livestock, including seeds, bark, and leaves.

Showy Mountain Ash Quick Facts

Black Locust Quick Facts

Zone: 2a
Zone: 3a
Height: 12 m (40 ft)
Height: 12 m (40 ft)
Spread: 3 m (10 ft)
Spread: 8 m (25 ft)
Light: any
Light: full sun
Moisture: normal
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: medium
Life span: long
Suckering: low
Suckering: high


Fall colour: reddish-orange
Bark: dark reddish brown to balck with furrows
Flowers: white, showy clusters
Flowers: Creamy white flowers in a pyramidal shape bloom in may-june
Berries: redberries in bunches
Seeds: dark brown peapod-like pods
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: SK, MB, ON, QC, NS, NB, NL
Other Names: dogberry
Other Names: false acacia, yellow locust