Properly dried pineapple can last for several months if stored correctly. To ensure its longevity, store the dried pineapple in an airtight container in a cool, dry place away from direct sunlight. Moisture and heat can cause the pineapple to spoil or become moldy, so it's important to keep it in a dry environment. Regularly check the dried pineapple for any signs of moisture or mold, and discard any pieces that appear to be spoiled. By following these storage guidelines, you can enjoy your dried pineapple for decoration for an extended period of time.