One of the most notable heralds of spring in the eastern United States is the profuse blooming of ornamental pear trees in front yards and along city streets. The Callery pear (Pyrus calleryana), and particularly its many cultivars such as ‘Bradford’, ‘Cleveland Select’, and ‘Aristocrat’, has become one of the most popular ornamental trees in North America. However, its commercial success has now become overshadowed by its tendency to spread along roadways and into natural areas through reseeding. Today this tree is considered invasive in many states, in stark contrast to how it grows in its native range in Asia.
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