do you keep jello in the fridge?
<answer> Yes, JELL-O lasts between 7 and 10 days in the refrigerator in an airtight container. <context> Quick Answer. According to EatByDate, homemade JELL-O lasts between 7 and 10 days in the refrigerator. JELL-O needs to be stored properly to preserve freshness and flavor. It is best to store JELL-O in an airtight container to avoid cross-contamination from other foods or moisture. Continue Reading.