Green Giant / Brooks #6 Poplar vs Black Locust - TreeTime.ca

Green Giant / Brooks #6 Poplar vs Black Locust

Robinia pseudoacacia

Populus x Green Giant

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Black Locust
Green Giant / Brooks #6 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.

Green Giant Poplar - also known as Brooks #6 - is a large, prairie hardy tree ideally suited to shelterbelts. Cold tolerance, drought tolerance, and disease resistance make the green giant a perfect fit for anyone looking for a low maintenance tree. This hybrid poplar variety produces no fuzz.

Black Locust Quick Facts

Green Giant / Brooks #6 Poplar Quick Facts

Zone: 3a
Zone: 2a
Height: 12 m (40 ft)
Height: 15 m (49 ft)
Spread: 8 m (25 ft)
Spread: 8 m (25 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
Maintenance: medium


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: brooks poplar, hybrid poplar