5. Sweet Potatoes
Sweet potatoes are among the most fascinating vegetables to regrow from kitchen scraps. Cut a sweet potato in half and suspend it in a jar of water using toothpicks. The cut side should face downward, just touching the water. Set it somewhere warm and bright. In about two weeks, roots and leafy shoots will appear. These slips can be removed and planted in soil to grow new sweet potatoes. Each slip can become a full plant with time and care.