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One of the toughest trees around, black locust thrives just about anywhere you plant it. The plant doesn't mind poor soil (in fact, it improves soil by adding nitrogen), drought, air pollution, salt spray, or even light shade. It's attractive, too, with divided blue-green foliage and fragrant clusters of white or pink flowers in late spring or early summer. It's native to areas of Eastern North America.
Black locust does have some downsides, however. It's a thorny tree and can spread by seeds or suckers and a couple of insect pests feed on the leaves so it may look scraggly by the end of the season.