I have grown it in England. It may even have been the first plant I grew in my own (as opposed to Mum & Dad's) garden. I stuck a pruning in a big tub of water and in due course was amazed at how well it rooted in there. Subsequently, it followed me from garden to garden until I moved to Cyprus. In England, I used to find the frost wrecked the flowers, but the stems and leaves were quite cold-tolerant (leaves could get 'burned' at tips/edges).