Yes, they're fairy-tale romantic, but Itoh peonies are easy-to-grow. Surprisingly tough little beauties, these can produce up to fifty flirty flowers on each plant. Known as intersectional hybrids, the leaves and flower forms resemble those of tree peonies. The growth habit is similar to that of herbaceous peonies. Flowers are held upright on top of the bush and never require any kind of support. When they bloom in late spring, place a vase next to the bed where you can appreciate their soft scent.