What cultivars fare best in places where there is heavy rain fall and high temperature during the summer?

The following varieties are from the southern parts of China, unfortunately most of which are not yet commercially available. We offer six varieties of the southern tree peonies: Peng Hong, Yu Lou, Feng Dan, Yun Fang, Yu Hong, Feng Zi He, Tongling Fen, Fen Zi Qiu, Feng Fen He, Qing Luo, Xi Shi, Mei Hong, Luo Hong, Fen Lian, Si Xuan, Que Hao, etc.