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The Itoh peony flower is a hybrid of common herbaceous peonies and tree peonies, also known as the intersectional peony. These flowers have enormous, long-lasting blooms and strong stems, as well as dark green, lush, deeply lobed foliage that lasts until autumn. With blooms that can spread up to 8 inches across, Itoh peonies are available in a variety of vibrant colors including yellow, coral, pink, red, and white. The developer was Japanese but passed away before these were perfected. Development was taken over by a breeder in California and they became available in the 1970's but were very pricey because of their rarity. In 2018 I was fortunate to visit a garden that specialized in these peonies.