Black Locust vs Ironwood Tree - TreeTime.ca

Black Locust vs Ironwood Tree

Ostrya virginiana

Robinia pseudoacacia

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Ironwood Tree
Black Locust

Ironwood Tree is one of the strongest and most resilient trees you will find in North America. In fact, it has the hardest and most dense wood of any North American tree. Prized for its oval shaped canopy and showy winter trunk, this striking shade tree will make a beautiful addition to any yard. Make sure you do not plant near roads as it is highly salt sensitive.

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.

Ironwood Tree Quick Facts

Black Locust Quick Facts

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Zone: 3a
Zone: 3a
Height: 8 m (25 ft)
Height: 12 m (40 ft)
Spread: 6 m (20 ft)
Spread: 8 m (25 ft)
Light: any
Light: full sun
Moisture: any
Moisture: dry, normal
Growth rate: slow
Growth rate: fast
Life span: long
Life span: long
Suckering: none
Suckering: high


Bark: dark reddish brown to balck with furrows
Flowers: Creamy white flowers in a pyramidal shape bloom in may-june
Seeds: dark brown peapod-like pods
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no


Native to: ON, QC, NS, NB, PE
Other Names: false acacia, yellow locust