What knod of manure?

Cricket manure with a mixture of bone meal, etc. . Got it from Brent & Becky's bulbs.

It is probably the things you added that turned the leaves yellow. I have discovered that peonies don't need much, if any, fertilizer. I put Miracle-Gro fertilizer on my peonies several times last year, and it turned the leaves yellow, too! I haven't used any fertilizer on them this year, and they are now back to normal.