Mine are in pots. I brought some inside last autumn, some outside were
covered with fleece, and the other outdoor ones were just left alone. Inside
ones fared best and are now green and growing. Outside fleeced ones are
showing signs of life. Outside non-protected ones are still sleeping but I'm
hopefull.

All in Suffolk, btw.

Also, I took some seeds from the cannas last year, planted them a few weeks
ago and now have a number of new plants about 8 cm tall and growing
nicely....

Best,

- h