Northwest Poplar vs Black Locust - TreeTime.ca

Northwest Poplar vs Black Locust

Robinia pseudoacacia

Populus x jackii Northwest

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Black Locust
Northwest Poplar

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.

Northwest Poplar is a large and fast-growing tree. Due to its wide spread, this tree makes a great shade or shelterbelt tree. Northwest Poplar tolerates partial shade, drought, and most types of soil. This poplar produces no fuzz.

Northwest Poplar continues to be popular as a shelterbelt species due to the great cost savings that come from the wide spread of the branches. It is a staff favorite because of the wonderful shade it provides all summer long.

Black Locust Quick Facts

Northwest Poplar Quick Facts

Zone: 3a
Zone: 2a
Height: 12 m (40 ft)
Height: 25 m (82 ft)
Spread: 8 m (25 ft)
Spread: 14 m (45 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: any
Growth rate: fast
Growth rate: very fast
Life span: long
Life span: short
Suckering: high
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: yes
Catkins: no
Catkins: no


In row spacing: 2.4 - 3 m (8 - 10 ft)
Between row spacing: 5 m (16 ft)
Other Names: false acacia, yellow locust
Other Names: balm of gilead, jacks aspen, jacks hybrid poplar