powdery mildew on Phlox

Hi Kids Party! Welcome to Garden Stew. Hundreds of 'David' phlox sounds gorgeous.

 

Thanks Cayuga. It was gorgeous but not as gorgeous as the hundreds of Yarrow-Achillea in a variety of colors, not just yellow.

 

Hi & welcome Kidsparty,You must have started those achilliea from seeds?
Where do you garden?
sewNsow

 

Thanks for the welcome. The Yarrow were received bare root from the Midwest and then grown here in New England.

 

I would spray every fortnight with fungicidal spray containing some of the following chemicals Myclobutanil
Penconazole
Flutriafol

 

Thanks gk. I try not to use chemicals in the garden but may consider it.