Last of the tree peonies to bloom is the Lutea group, often overlapping with the bloom period of herbaceous peonies. Sometimes referred to as Delavayi, this group is a Tibetan species that has a wide variety of yellows, bronzes, and oranges.

Of special note is that lutea hybrids are the main tree peony group that has been used to create intersectional peony hybrids-intersectional peonies have inherited the wonderful colors of the lutea hybrids.

Note this is our best guess for the timing of the bloom. Warm weather will speed it up, cool with extend it, rain and wind can change it overnight, and a sunny day can make everything pop. Some days will have thousands of flowers in bloom and others will not.