Posted: 24/07/2015 at 13:23
You won't stop growth CharleyD like you describe. All you can do is shape it at the pruning stage into a ball shape. If you do get straggly growth, you can prune back the longer stems to a leaf axil which stimulates a flowering shoot. You'll have to cut the longer shoots right back to within the ball, and the new flowering shoots, which are always shorter, will grow back to the edge of the ball. Some varieties are better at keeping their shape than others, so try to stick to those, they are usually the more popular ones.