What kind of tree peonies do you have? My three are all Chinese tree peonies...I got all but one from Goldenport International as fairly young plants. Unfortunately, they shut down a few years after I got Lan Hudie. Cricket Hill sells older plants but their selection isn't as good and they're very, very expensive...

All of a sudden, this year, after 8 years, they decided to become proper shrubs. ^^;;;;;;

I've seen a lutea hybrid(High Noon) in person but never a Japanese tree peony. I'm intrigued by Shima-nishiki(which is probably supposed to be "Striped Brocade" and not "Island Brocade") but I've heard that it's only arbitrarily striped...I'd hate to have it revert like one of those striped Gallica roses!