20. Kohlrabi
Kohlrabi may look strange, but it’s simple to regrow from its base. After slicing off the bulb, save the bottom inch with some of the root still attached. Place it in a shallow dish with water, root side down, and keep it in a sunny spot. Change the water every few days. Once green shoots and roots begin to grow, transfer the base to soil. It will slowly develop into a new bulb. Though not as common in kitchens, kohlrabi is tasty raw or roasted and worth regrowing.