Jaggery syrup should be refrigerated to extend its shelf life and prevent spoilage. Storing it in a cool, dark place might work for a short period, but refrigeration is the safer option.
Jaggery syrup, due to its high sugar content, is susceptible to fermentation and mold growth, especially in warm and humid environments. Refrigeration significantly slows down these processes, preserving the syrup's quality, flavor, and consistency. The cool temperature inhibits the activity of microorganisms that cause spoilage. When properly refrigerated in an airtight container, jaggery syrup can last for several weeks or even months. Storing it in a cool, dark place without refrigeration might only keep it fresh for a few days, depending on the ambient temperature and humidity. Therefore, refrigeration is the recommended method for long-term storage.
To prevent crystallization of the jaggery syrup in the refrigerator, add a teaspoon of lemon juice or vinegar while making the syrup. The acidity helps to prevent sugar molecules from binding together and forming crystals.