Amyta,

Not to worry, powdery mildew is easily brought under control with a number of fungicides. Since I prefer organic solutions I use Garden's Alive's Soap Shield.

Note that with all the rain we've been having, you need to use the shortest interval recommended for spraying to make sure your plants stay protected.

~Mike

Thanks, Mike. I'm relieved and did wonder about all the rain washing off my treatments.
Amy

I find it is brightening up some darker parts of the yard.