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Callery Pear

Bradford Callery Pear (Pyrus calleryana ‘Bradford’): Is it really Sterile?

A native of Korea and China, this, now ubiquitous horticultural tree, was first grown from seeds by the USDA Plant Introduction Station in 1963. It is very easy to grow and transplant, has white flowers in spring, leafs out early, holds its leaves well into autumn and has good color in late November. It also resists disease and insects. No wonder it is grown and planted so widely. There is also a story, apparently believed by many landscape architects, that it does not produce viable fruit, in other words, that it is sterile. So no worries about it being invasive, right?

Well, unfortunately, it is not at all sterile. Most individual trees produce crops of small, brown fruit the seeds of which are quite viable. Evidence of this can be seen along Route 440 in south Staten Island in New […]