You might be noticing powdery mildew (a disease that causes a grayish, powdery film on leaves) in your garden. Common plants that could be affected are lilacs, phlox, bee balm, zinnias and nannyberry ...

“My peonies are covered in what looks like a white powder. What is that, and will it hurt my plant?” — P.F. Peonies are susceptible to powdery mildew, and what you are describing sounds like powdery ...

Every time Terri publishes a story, you’ll get an alert straight to your inbox! Enter your email By clicking “Sign up”, you agree to receive emails from ...

The most widely grown of all the herbs, basil, is also highly susceptible to downy mildew, which spreads quickly through spores dispersed by wind and can wipe out an entire field or greenhouse. The ...