The first thing I did this garden season was put this sweet potato in a jar of water. That was late January. Now it’s sprouting prolifically, above and below the water line. When those sprouts are a few inches long I’ll snap them off and put them in soil, where they’ll grow roots. They’ll go in the garden well after the last frost. (Sweet potatoes are tropical vines. They don’t like cold one bit.) I’ll probably harvest them around Thanksgiving. So, that’s about 10 months from start to finish.