Canna Flower Winter. First cut them back to 6 to 8 inches high. Most canna lilies are winter hardy in zones 8-11 so in these warm climates the rhizomes can be left right in the ground.
In Zones 6 and colder youll need to dig up your canna rhizomes in late fall after your first killing frost if you want to grow them again next year. Leave your cannas in the garden and cut them back to 8 to 10 inches high. Cannas are not true lilies but have been assigned by the APG II system of 2003 to the order Zingiberales in the monocot clade Commelinids together with their closest relatives the gingers spiral gingers bananas arrowroots heliconias and birds of paradise.
07052021 Store cannas over the winter in a dry place that doesnt drop below 40F 4C often an attic or basement.
Photo by Fpalli CC BY-SA 30 Due to Canna erebus being more of a tropical plant it will not survive in locations that experience frost and winter. Storing canna bulbs is simple and easy and anyone can do it. When the flowers fade or turn pale they can easily be removed. Cannas are not true lilies but have been assigned by the APG II system of 2003 to the order Zingiberales in the monocot clade Commelinids together with their closest relatives the gingers spiral gingers bananas arrowroots heliconias and birds of paradise.