My Peony Has Mildew And Still Present Now In The Winter. Can It Be Cured And What Can

Question

Anything to do while it’s dormant?

Answer 1

During the summer you can try horticultural oil as suggested by this article below. Since it is the end of the year, I would remove all the foliage since it is going to die back anyway.

https://www.gardeningknowhow.com/ornamental/flowers/peony/powdery-mildew-peonies.htm

https://www.gardeningknowhow.com/ornamental/flowers/peony/treating-spotted-peony-leaves.htm