Powdery mildew disease is one of those plant diseases that we tend to tolerate, because it's usually not lethal to plants: It just spoils their looks for a while. If you grow a traditional type of Phlox paniculata, perhaps you've been tolerating powdery mildew disease for years. At the same time, putting up with that unsightly powdery film on your plants may be a prime reason why you don't get more joy out of your Phlox paniculata. The solution? Short of trying to cure powdery mildew disease, you could just grow 'David' phlox.
I grow several different breeds of Phlox paniculata (garden phlox), but one of the nicer types I keep in my flock is a cultivar called 'David.' Older types of Phlox paniculata are very susceptible to powdery mildew disease. But newer types like Phlox paniculata 'David' are mildew-resistant, which keeps the foliage nice and healthy looking right through the summer.
Read article: 'David' Phlox
Sign up for my free weekly newsletter: Landscaping Newsletter