Green Ash vs Black Locust - TreeTime.ca

Green Ash vs Black Locust

Fraxinus pennsylvanica

Robinia pseudoacacia

COMING SOON

(new stock expected: fall of 2025)

Green Ash
Black Locust

Green ash is a fast growing tree with incredible golden yellow leaves in fall. This tree is native to the prairies and is well suited for drought and cold. Green ash can also tolerate soil compaction, periods of flooding and a wide variety of soils including alkaline. This makes green ash ideally suited for use in urban environments.

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.

Green Ash Quick Facts

Black Locust Quick Facts

Lowest Price: $2.99 - SAVE UP TO 40%
Zone: 2b
Zone: 3a
Height: 18 m (60 ft)
Height: 12 m (40 ft)
Spread: 12 m (40 ft)
Spread: 8 m (25 ft)
Light: full sun
Light: full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: long
Life span: long
Suckering: low
Suckering: high


Fall colour: bright yellow in early fall
Bark: dark reddish brown to balck with furrows
Flowers: Creamy white flowers in a pyramidal shape bloom in may-june
Seeds: seeds located within samaras
Seeds: dark brown peapod-like pods
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no

In row spacing: 1.8 - 2.4 m (6 - 8 ft)

Between row spacing: 5 m (16 ft)
Native to: AB, SK, MB, ON, QC, NS, NB, PE
Other Names: downy ash, red ash, swamp ash, water ash
Other Names: false acacia, yellow locust