I pulled all the Cannas out of my flowerbeds a couple of years ago. They still creep through any fence crevices they can find, as this one has done. They are so invasive, they just took over the flowerbeds by my pool, so they had to go. The flowers are beautiful, though.
Sad they are, as a neighbor gardener describes them, such 'thugs' in the way they take over. They are beautiful. Sort of like spiderworts that took over my garden.