Thanks for the link. I have read quite a bit about it on various sites but they all say one thing that can't be accurate. I am afraid the a partly shaded area of a garden in northern England, subject to heavy rain, frost and the massive chill of last winter according to the experts should have seen the end of my sister's plant. Although the plant has never turned red or produced flowers it has grown from one small rosette to several very large ones. So I am not really sure whether I should put it in full sun or afternoon shade. I have one large rosette and one small one so I can experiment a little. I'll let you know how I get on :-)