Those who admire the colorful and exotic flowers of tree peonies, but prefer the perennial growing cycle of herbaceous Peonies, will love the Itoh Peonies, also known as intersectional hybrids. They tend to resemble tree Peonies with a domed, vigorous growth habit and large double flowers with disease-resistant lacy, dark green foliage. After the flowering cycle, gardeners will enjoy the handsome bush for the remainder of the season. Once established, Itoh Peonies have an extended blooming period, with as many as 50 blooms in a single season due to their ability to produce primary and secondary buds. They are excellent in cut flower arrangements. They will grow to three feet tall and wide and continue to improve with age.