Posted: 21/02/2017 at 20:29
Agree with DHR, only buy one in flower if you want to guarantee future flowering. If you can't do that for some reason, buy one which is grafted. Small ones available from supermarkets and the like are usually grown from seed and there is no guarantee that they will ever flower. Having grown 2 flowerless ones from seed nearly 20 years ago and carefully pruned them exactly as per RHS advice, I speak from experience!
Actually, that's not completely true as one of them did flower once - the same year it died from honey fungus..