Thanks to Nathan for the detailed note, particularly about night temperature possibly affecting peony flower color. In fact, My former garden was about 400 meters higher than the present one, and the nights were always cooler. I can't do anything about that, but I can apply an iron supplement (perhaps that used for rhododendrons?) and see if the color of Paeonia officinalis returns to its former beauty next year. Interestingly, Paeonia tenuifolia does not seem to have changed after the move, and it also has pure red flowers. The soil pH here is probably similar to what the plants had before, but I will test it something this summer to be sure. Incidentally, I just returned from a trip on which I saw Paeonia mlokosewitschii in the wild in Azerbaijan. It was very similar to my seed grown plant except that the leaves had more red pigmentation. Jane McGary Portland, Oregon, USA