18. Radishes
Radishes can be regrown from their tops, though it’s more for greens than the root itself. Cut off the top inch of the radish and place it in water with the cut side down. In a few days, leafy greens will begin to sprout. These tops have a slightly spicy flavor and can be used in salads or sautés. If you plant them in soil, there’s a chance new roots will form—but it’s mainly about harvesting the greens.