F. cymosum， which is the most widely distributed buckwheat wild resource， represents high genetic diversity in wild population. Due to the environmental changes and human actions that result in the loss of F. cymosum wild resources， it is urgent to protect F. cymosum wild resources. In this study， based on the collected F. cymosum wild resources， we compared the differences between sexual reproduction and asexual reproduction on the off-site reproduction of F. cymosum and discussed the effects of tuber propagation on the off-site propagation of wild buckwheat in different geographical environments. These results showed that the tuber reproduction of F. cymosum was relatively better， and it was conducive to its outcrossing and fruiting after a large population was formed by off-site reproduction. The differences on the altitude of habitat， climate condition and breeding site might cause influence on the germination， growth and reproduction of wild F. cymosum. The geographical conditions and local climate at Zhaojue County of Yunnan province were suitable for the off-site reproduction of F. cymosum. Collectively， these results might provide certain reference for ex situ propagation and conservation of F. cymosum.