Last fall/winter, had a store bought sweet pot. start to sprout. So lopped off the top and planted it in a pot. Used it as a cheap plant for the classroom. Once school let out I planted it in a barrel at a friend's house. The vines really took off. Finally got around to pulling up the tubers. I was really amazed by how many were produced all by one plant. Unfortunately, all the tubers were small -- some not even as long or thick as my little finger. Ah well, was still kind of a fun experiment.