Unopened jelly, if stored properly in the fridge, can last for quite a long time. Generally, the shelf life of unopened jelly is around one to two years beyond the manufacturing date. This timeframe can vary depending on the specific type and brand of jelly, so it's always a good idea to check the expiration date on the jar.
To maximize the shelf life of unopened jelly, it's essential to store it in the right conditions. Keep it in a cool, dark place, such as the back of your refrigerator, where the temperature remains consistent. Make sure the lid is tightly sealed to prevent air from entering the jar.
If you notice any signs of mold, off smells, or changes in the appearance of the jelly, it's best to discard it, even if it's within the expiration date. Once the jar is opened, the shelf life will be significantly reduced, typically to about one to three months, depending on the product and storage conditions. Always follow any storage recommendations provided by the manufacturer for the best quality and safety.