I have a large willow in the backyard and wondered if it's true that you can cut a 3' long whip/single branch and bury it halfway down in moist soil and it will root and grow a tree. Is this true? Is there a better way? I also heard that when a cutting has rooted, it would grow fast looking like a smaller version of a full sized tree in just 4 years? If I ever move in future, i'd like to take a few cuttings of the willow with me and try rooting them. Thanks!