Sweet potato is a healthy and versatile vegetable. It is also an easy plant to grow. It does not need much water or fertilizer and has a low risk of disease. Sweet potato vines grow very quickly and close to the ground. One of the fastest way to propagate sweet potatoes is to harvest cuttings from the vine. This is a simple process that will eventually yield you many more sweet potato vines.
Choose a runner vine on your sweet potato plant and use a pruning shears to cut off a 12 inch section.
Remove all the leaves from your cutting except for the smallest leaves at the very end. You should be able to pluck the leaves off with your fingers. Place the cutting on the ground and cover the entire length of it, minus the small leaves, with soil.
Keep the cutting moist by watering lightly every day. Soon roots will start growing out of every leaf node and the cutting will root itself into the ground.