Cannas will grow in the few temperate regions of the U.S. in the winter months, but because of the shorter length days and longer cool nights they typically perform below summer levels. Results will be heavily predicated on temperature. They often will require more attention to certain pathogens relative to the cold season. Receiving healthy rhizomes will be important but as your warm weather arrives they will have a great early start. Be prepared to supply plenty of water come summer.
Kent