How to keep sweet potatoe vines through the winter, to reuse in your garden
The best way I have found to ensure that your crop is the exact same the next year, is to take a cutting of the plant you want to keep dip it in a mixture of a few drops of honey, a crushed aspirin tab, and just enough warm water to get it to mix into a paste. Dip the cut end into this, and mix the rest with water. Water the soil with this until it is moist. You will have rooted plants in 1 to 2 weeks. Keep these indoors in a bright, south-facing widow, or under horticultural lighting.