Sweet Potato Vine
Recently I visited my state fair (California) and in the plants exhibit they had many beautiful ornamental sweet potato vines. I am wondering about when to plant and how to treat the plants in the winter. Apparently they grow very fast; would it be too late to plant in August? Where I live we don't get many hard freezes, rarely below 30 deg; can the tubers be left in the ground over winter in these conditions?