Species PlantsBlack Locust

Black Locust

Robinia pseudoacacia

CommonPlant
Illustration of Black Locust (Robinia pseudoacacia)
Safety note: Bark, seeds, and leaves are toxic; contact with bark can cause skin irritation.

Black Locust is a nitrogen-fixing native tree of the Appalachian region that has naturalized widely across North America and globally. Its fragrant white flower clusters in May are one of the most important nectar sources for honeybees, producing the prized black locust honey. Its wood is remarkably rot-resistant, lasting decades in soil contact.

Habitat
Rocky slopes, disturbed areas, and forest edges; native to Appalachians
Diet
Flowers provide exceptional nectar for honeybees; seeds eaten by some songbirds
How common
Common

Best time to see a Black Locust

The best time to see a Black Locust is April–July, when about 63% of U.S. sightings happen, based on 35,690 research-grade iNaturalist observations.

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