Please help with sick PJM
Hello, I have not posted before but I am very worried about my PJMs. I have three lovely PJMs that were planted while in bloom early this spring. In upstate NY, we have had a ton of rain and the plants were doing beautifully and have nearly doubled in size. But now, there are many reddish and yellowish leaves with dry looking brown spots on them. Many of these leaves are dropping off. Could this be rust? Insects? What can I do to help the problem?
I am so worried about my lovely PJMs!
Thank you so much!