Powdery mildew is a fungal disease that can attack a wide range of plants, from phlox to bee balm to oaks.
- Powdery mildew is a fungal disease that can attack a wide range of plants.
- There are thousands of species of powdery mildew fungi; most are very specific to their plant host, meaning powdery mildew of lilac will not spread to phlox or other annual and perennial flowers.
- The disease most commonly affects plants after flowering, particularly in hot, dry weather.
- Powdery mildew-resistant varieties of many common landscape plants are available.