When it begins pushing out new growth in the spring, take a cutting on the soft wood, about 3+ inches if possible. The cut should be a bit under the junction where the leaves come out (the node). Strip off all the leaves except the top 2; those left can be cut in half. Immediately after cutting, dip the cut end into a rooting hormone (some people choose not to use one) the stick it in a small pot (4" pot) with moist, clean potting soil. Keep soil moist but not sopping wet. Make sure the end node, by the cut, is fully in the soil. This is where it will root. It may take many weeks for it to root. After 2-3 weeks, you can carefully dig it out to check for root growth, then replant. Once you can turn the pot over in your hand, removing the pot and check for roots on the underside, and if you see roots visible on all 4 sides, it is time to bump it up to the next sized pot.
Texas Certified Nursery Professional
Texas Master Naturalist