They should never be held at room temperature, with the exemption of the time serving and cooking. This should never stand at room temperature for more than two hours. Milk that has been kept at room temperature should never be returned to its original, container. The only two foods than can be stored indefinitely under proper humidity are salt and sugar. The quality of other baking supplies and grain products deteriorate over time.
Some grain products are susceptible to the growth of mold.
With the exception of avocados, bananas and apples, fruits are best stored in the refrigerator. The USDA recommends that citrus fruits be kept in a cool room with temperatures ranging from 60 degrees F to 21 degrees F. Berries, cherries, and plums shouldn't be washed until they are at the preparation or serving stage. Store potatoes at a temperature of 45 degrees F in ventilated containers. Do not store vegetables that have strong odors together with those that absorb odors easily. A classic mismatch are onions and potatoes.