Abstract
Forced flowering of Chinese tree peony cultivars was tested in comparison with Japanese cultivars. All the Chinese cultivars flowered in late December as early as one of the earliest flowering Japanese cultivars. One of the most popular Japanese cultivars flowered late in January. Flower harvest rate was over 80% in all the cultivars except one Chinese cultivar in which flower buds blasted during forcing. Some Chinese cultivars produced crown or bomb type flowers which were rarely found in Japanese cultivars. All the Chinese cultivars had short stems, suggesting that they were suitable for pot flowers rather than cut flowers.
