Place the pinto beans in a bowl. Soak them in warm water at room temperature overnight.
Dampen a paper towel. Place it in the bottom of a plastic zipper bag. Place two to three beans in the bag.
Place the plastic bag in a dark, cool environment. Kitchen cabinets or pantries work well.
Inspect the bag every day to see if any beans sprouted.
Plant the sprouted bean after germination. Place it in a pot, 3 to 4 inches deep in soil, and water it to keep the soil damp. Sit the pot in a sunny window for at least eight hours a day.
Transplant the bean sprouts once they grow to 3 inches. Keep the plants at least 15 inches apart, and plant them as deep as they are in the container.