"Marg" wrote in message
om...
For yrs I've had great success by digging them up once they've been
bitten by the frost, rinsing them off, letting them dry for a few days
and then wrapping in plain paper bags and storing them in the garage.

That's OK if your garage remains above about 40F. I gave my sister some
cannas and at the end of the season she carefully dug and boxed them. She
stored them in her unheated garage in Cleveland where temperatures dip
to -20F. Needless to say they didn't make it.