Read more: Think Twice Before Using These 10 Items In Your Yard Check your peonies regularly for signs of powdery mildew, like faint white patches and curling leaves, so that you can start ...

As the growing season progresses, keep an eye out for a white or grayish-white powder ... plants. It isn’t pretty. Some plants are more susceptible, with hydrangeas, lilacs, phlox and peonies ...