Bartzella has been a popular Itoh for some years. It received an American Peony Society (APS) gold medal in 2006 and for good reason as it stands very tall and was one of the first yellow Itohs to sport a double bloom. Bloom time for this Itoh is mid-season. Itohs have a larger range of colours, longer flowering periods and present a bushier more floriferous plant. They carry foliage similar to that of the Tree Peony however die back to ground level just as their herbaceous cousins. Itoh’s are more likely to flower much better in warmer and more temperate climates. They also have a higher tolerance to disease.