The main tree is a parent 'something' onto which was grafted a knotted, curly-wurly willow. We lost the grafted top after three years when the storm snapped the top off. This spring the remaining stump (3 feet) sprouted growth from 3 'warts' up its trunk. They've grown very quickly - and tall. Bright green but the leaves are nothing like the original grafted willow. What should I do now? I wish to keep the new bush-looking growth as, while it's nothing like I bought, it is attractive and fills a space. Hope this makes sense - difficult being unable to show you! The tree/bush has added another 3 feet in height to the 3 foot high trunk.