premise: How to grow a new grapevine using cuttings.
hypothesis: In the spring, snip off the dormant vines in pieces about 3 feet long. You need 4 buds for every piece that you cut. Leave the green or wet parts alone at the bottom of the plant. This will release new growth until the next winter, when you can cut them back again. Each cutting will produce a new plant that will germinate again.