I've got one growing in the garden, not a pot, so can't help you there. Mine is planted in a sheltered spot in the garden and hardy, we have had temperatures in the past of -14c and it has survived.
They tend to grow on more delicate stems, but are quite vigourous, at least it is in my garden, It readily layers itself so you can propagate quite easily.
Sorry this doesn't really answer your original question, but might be of general help
Chris