another peony question/problem

i'm pretty sure i read about this problem somewhere in this forum already, but i can seem to locate it so i'm asking again.

I have four peony plants in my garden, (not the tree peony) They were planted by my mother probably close to hhmmm 10 years ago. I do not remember their latin names. Two grow very big fluffy white flowers and two grow pink flowers that look similar to wild roses, not a lot of petals. Recently, in the past couple years or so, the two pink ones have grow leaves that are all wrinkled up and only produced one, or no flowers. they look burnt actually.

What's wrong with them? and is there anything i can do for them?

I have pictures of the flowers, but not the burnt looking leaves.

 

Botrytis blight for Peony, perhaps? The other possibility is thrips - follow the advice in that factsheet to determine which one is the issue.

 

Thank you for the link! I don't think that's it though. :(