I added 2 more tree peonies to the 5 that I have, and I will stop with that. I have two ITOH now, but with them being still so expensive, I will probably not add to that either. Last year, I went on a big splurge and bought 17 more herbaceous ones. I am officially out of room - I tallied up my numbers and got 47 HP (plants, not varieties since I have multiples of some varieties), 7 TP and 2 ITOH - more than enough for one species. I'll just have to enjoy Oldgardenrose's and others who have fernies vicariously.