Plantains ripen best in a warm and well-ventilated place. If your kitchen is very cold or stuffy, try to find another room in your house to ripen them. Plantains can ripen in cooler environments. It just may take longer.
Remember, a warm and well ventilated environment is best for ripening plantains. [6] X Research source
Remember, ripe plantains are black and wrinkled in appearance and soft to the touch. [8] X Research source
Plantains are mostly black when ripe with a few yellow streaks. Plantains that are completely black are still edible, but may be a little overripe. [10] X Research source
