Black Eyed Susan

by S.
(Pittsburgh, PA)

My Blacked Eyed Susan have brown spots on the lower leaves. This is the second year this has happened. It does not affect the flowers but is unsightly. What is a natural way I can treat this?

Doug says this is botrytis or powdery mildew (likely mildew) and this is quite common on this plant and hit shows up as these spots rather than the more common white "powdery" look. Check it out here.