Unpeeled/Uncut Pineapple

One reason why you should avoid refrigerating uncut pineapple is due to its sensitivity to low temperatures. Pineapples thrive in warm climates and are not accustomed to cold environments. Storing them in the fridge can cause chilling injury, which results in loss of flavor, texture, and nutritional value.
Additionally, refrigeration may speed up the ripening process of an uncut pineapple. As pineapples continue to ripen after they are picked from their plant, keeping them at cooler temperatures can accelerate this process.