The best way to keep potatoes fresh and sprout-free is by storing them in a perforated paper or linen-cotton vegetable bag or in a basket in a dark, cool and ventilated place. Potatoes should not be kept in a sealed or airtight container.
Potatoes should be kept in a rather humid place to keep them from becoming flaccid and withered in appearance. They should not be kept with onions because both emit gases that cause a steep quality decline in the onions. An old way to store potatoes involves placing a muslin bag filled with a mixture of dried lavender, sage and rosemary right by the potatoes. These herbs suppress sprouting and stop bacteria that can lead to storage rot.