Tom. I am unsure whether or not they grow in the very cold. I have a friend who has two different vines in Tasmania (approx. coordinates 42.8806° S, 147.3250° E). But there are so many crop cultivars and grafted ones as well. Mine are supposedly Hawaiian Purple and are from seed. They look like the pictures on the web.
If you do get one, ensure its planted over a cow's liver or a heart - it is a folk thing but apparently this has a real agricultural basis. See here:
http://www.abc.net.au/gardenin...
