To enjoy the blooms of Herbaceous Peonies later in the summer, cut the buds just before they open on stems about 6 inches long. Lightly wet the inside of a large, resealable plastic bag, and place the buds inside. Close the bag and place it in your refrigerator (not the freezer). Later take out the buds you need and float them in a shallow bowl of water. When bud is about 1/3 open, lift it, then cut the stem to 1 1/2 inches long and refloat the bud.