Black Locust vs Round Leaf Hawthorn - TreeTime.ca

Black Locust vs Round Leaf Hawthorn

Robinia pseudoacacia

Crataegus chrysocarpa (Crataegus rotundifolia)

Black Locust
Round Leaf Hawthorn

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.

Getting its name from rounded, toothed leaves, the Round Leaf Hawthorn is a winter hardy shrub that grows small, red, berry-like fruits.

Commonly used for landscaping, this shrub can also be found along stream banks and in wooded areas. Caution is advised when handling the Round Leaf Hawthorn, as it can have sharp thorns approximately 1" long.

Black Locust Quick Facts

Round Leaf Hawthorn Quick Facts

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Zone: 3a
Zone: 2a
Height: 12 m (40 ft)
Height: 3 m (10 ft)
Spread: 8 m (25 ft)
Spread: 3 m (10 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal, wet
Growth rate: fast
Growth rate: slow
Life span: long
Life span: long
Suckering: high
Suckering: none


Foliage: round, serrated
Bark: dark reddish brown to balck with furrows
Flowers: Creamy white flowers in a pyramidal shape bloom in may-june
Flowers: showy white
Fruit: small red berries
Seeds: dark brown peapod-like pods
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


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