Experts and BHG readers answer.
Leggy peonies, not growing well
To get a better handle on what's going on, we really need more information. Are they in full sun? Peonies need at least 8 hours of direct sun a day to bloom and not get leggy. Are they being overfertilized? Too much plant food can make them tall and flop over. Are they planted at the right depth? Peonies don't bloom well if they are planted too deeply. I can't help too much, not knowing more about your plants, but these are the main reasons I can think of that would explain your peony problems.