(Question)
Hi …place was doing well…a very old peony plant…but recently turning brown, even on flowers. How can I help my beautiful old plant? Thank you,
(Answer)
Firstly, a diagnosis of the problem needs to be made before any rescue or remedy attempted. Unfortunately, your photo isn’t clear enough to make a definitive diagnosis, so attached below are two super websites which you can use to guide you to the problem by comparing your plant with the pictures they show.
Peony Diseases and Pests | American Peony Society
Hope this is helpful.