What month do canna lilies flower?
They flower from June to October. Canna lilies will only overwinter outside in a very sheltered garden in a mild area. To overwinter cannas in most parts of the country you will need somewhere frost free to store them in winter. Alternatively cover plants with a generous mulch and keep your fingers crossed. Winter Storage: The Temporary Transplant In many parts of the country, transplanting cannas actually happens twice a year: once when you dig them up in the fall and once when you replant them in the spring. If you live in a zone where the ground freezes (Zone 7 or colder), your cannas won’t survive the winter outdoors.In colder areas north of zone 8, these tropical beauties won’t survive in the ground during winter. Gardeners in these regions can either treat cannas as annuals, discarding them after the season, or dig up and store the bulbs for replanting in spring.You could leave your Canna tubers in the ground, but some, if not all of them, may ROT over the winter. I’ve found that most of the Cannas growing in a sheltered, south-facing garden in my front yard survive the winter and resprout nicely each spring. So I leave those in the ground and the bulk of them survive.Container-grown canna can be left in their pots overwinter. Simply stop watering as the plants naturally die back, and move the pot somewhere frost free and light, such as a heated greenhouse or sunny conservatory.