By Cathy Cromell
Holly Shimizu, Executive Director of the U.S. Botanic Garden (USBG) in Washington, D.C., lives a plant lover's dream. She has worked in world-famous gardens, including a...more
Spray horticultural oil on dormant apples, plums, and cherry to smoother overwintering insects hiding in bark crevices. Spray on a calm day covering all sides of the branches until the oil drips off.
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