13. Parsnips

Parsnips are cold-hardy root vegetables that can regrow their leafy tops from scraps. Cut off about an inch of the top and set it in a shallow dish with water. Place it in indirect sunlight and wait for green shoots to sprout from the center. While you won’t regrow the root itself, the greens can be used as a garnish or flavor base. With time and transplanting to soil, you may eventually get new roots forming below.