15 September 2018 Sweet Potato Harvest Posted on September 15, 2018 by Durgan 15 September 2018 Sweet Potato Harvest15 September 2018 Sweet Potato Harvest The sweet potato patch was harvested about ten pounds from 6 plants. The vegetation is extensive and the tubers are all around the plant within about a foot radius around the main stem. These are the strong purple type. They store well in a root cellar. One about the size of a wiener is quite filling. I usually bake them in a Dutch oven at 400F for about 50 minutes.