Canna is hardy. Canna is native to tropical areas such as America, India and Malay Peninsula. It likes warm, humid, sunny, not cold-resistant, afraid of strong winds and frost. Canna will freeze to death at a few degrees below zero. Canna will freeze to death at MINUS ten degrees in winter. Canna is afraid of cold in winter. Canna is afraid of cold in winter. Can canna be raised outdoors in winter? Canna can also spend the winter outdoors in southern China. If you are in the cold north, you must take warm measures.