Does grape jelly need to be refrigerated?

Grape jelly, like most jams and jellies, has a high sugar content which acts as a preservative, preventing the growth of bacteria and mold. This means that unopened grape jelly can be stored at room temperature for an extended period of time, typically up to 12 to 18 months, without spoiling.

However, once the jar of grape jelly is opened, it is recommended to refrigerate it to maintain its quality and prevent potential spoilage. Refrigeration slows down the growth of microorganisms and helps preserve the jelly for a longer period. The cold temperature of the refrigerator also helps maintain the jelly's flavor and texture.

In general, it's always a good practice to store opened grape jelly in the refrigerator to ensure its safety and quality. If you notice any signs of spoilage, such as mold growth, unpleasant odor, or off-taste, it's best to discard the jelly and get a fresh jar.