• Hardy
  • Canadian Grown
  • Value Packs
  • Shipped in ON, QC, NB, NS, PE


Robinia pseudoacacia

Black locust, False Acacia

Main interest:
fragrant white spring flowers, fast growing, nitrogen-fixing species, deer resistant, yellow foliage in the fall
full sun
Soil humidity:
dry to moist soil
Flower colour:
white with a yellow blotch
Mildly fragrant
Flowering period:
May to June
USDA Hardiness:
zone 3a: -40 °C (-40 °F) View Zone Map
Mature height & width (max.):
height: 75 ft (23 m) width: 30 ft (9 m)
specimen, erosion control

Black locust is a fast growing, medium-sized tree that averages 12 to 25 m in height. Its crown is narrow with an open, irregular form and contorted branches. It has an average lifespan of 80 to 90 years.

Robinia pseudoacacia is a member of the pea family, and has fragrant drooping clusters of 10 to 25 pea-like, hanging white flowers (with a yellow blotch on the upper petal) in late spring. The trees typically flower for 10-20 days in May to June, about one month after the leaves emerge. The flowers are insect pollinated and attract hummingbirds. Its smooth, flat, dark red-brown seed pods contain 4 to 8 flat, brown, bean-like seeds. Seed pods form in fall and many persist on the tree through winter. It’s important to note that these seeds are toxic to many animals, especially horses.

The dark green pinnate compound leaves turn to a wonderful golden-yelllow in the fall, contrasting nicely with the deeply furrowed dark gray-brown bark.

A nitrogen-fixing species, Black locust will grow almost anywhere, tolerant of many types of soil. However, it is generally intolerant of shade and competition, tending to thrive in open areas. It is cold hardy and can withstand weather extremes, such as prolonged droughts. These qualities, and its fast growing nature makes it very popular for land reclamation, and erosion control.

The wood of the False Acacia has a wide variety of commercial uses, including fence posts, poles, railroad ties, ship timber, nails for wooden ship construction, pulp, crates, woodworking projects, etc. Native to Eastern United States (but not Canada), this tree is widely planted in North America, and can push out native species in some areas. It is important to plant advisedly.

Please use availability information as a guide only. The weather is a fickle thing, and impacts when our plants are actually available for shipping. Please be aware that we are not answering emails regarding plants availability. The best advice we can give you is to check back once in a while, choose a size option and check the current stock.

$16.99 - $40.99

Ships ON, QC, NB, PE, NS

Also known as: Post Locust, Bastard Acacia, Common Robinia, Fragrant White Locust, Yellow Locust

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