With their large, full flowers and long life, peonies add consistent color to an early summer garden. Peonies have a short blooming period, but their foliage remains green and lush through fall, providing a background for other summer flowers. Peonies live for 30 years or more, so proper care each year is vital if they are to remain at their best. There are two types of peonies: herbaceous peony and tree peony. Herbaceous peonies require proper trimming each fall, while tree peonies rarely need a severe trim.
Peonies survive freezing temperatures and often do not require a mulch after their first year in the garden.
Peonies grow for 15 or more years without the need for division. When you do divide, do so in the fall as you prune back the plants.