Potatoes should not be stored next to onions because the gas given off by onions accelerates the decay of potatoes. Store potatoes in a cool dry place away from the onions.
Store potatoes in a cool dry place. They will keep at room temperature for up to two weeks and longer when stored in cool temperatures.
If potatoes are purchased in a plastic bag, remove them from the bag and place in a basket or other container that they will have proper air circulation. A paper sack would be better than plastic because the plastic will trap moisture.
Do not store in the refrigerator because the cold temperatures convert the starches into sugar, which causes the potatoes to become sweet and turn a dark color when cooked.
Do not store with onions, the gas given off by onions accelerate the decay of potatoes. The same thing will happen if stored next to apples.