I think my tomato and potatoes will come from more traditional means. Not to mention a nice thick no fertilizer, no pesticides/herbicides beefsteak tomato is hard to beat.. .................................................................................. TomTato plant grows both tomatoes and potatoes Created by UK horticulture company Thompson and Morgan, the TomTato is not the result of genetic engineering. It's "simply" the top of a cherry tomato plant and the bottom of a white potato plant, that have been grafted together at the stem.