A day or so. Ripe prunes are high in sugar, so if you don't keep them in the refrigerator, plus the high summer temperatures make them susceptible to rotting and spoilage, they usually stay fresh for a day or so. If you don't have a refrigerator, you can put the prunes in a plastic bag and put them in a basin with cool water to extend the serving period a little.

About a day or so. After ripening, the sugar content of prunes is high, if not put into the refrigerator to save, coupled with the high temperature in summer, it is very easy to rot, the general freshness of room temperature is about a day or so, if there is no refrigerator at home, you can put the prunes in a plastic bag, and then put it into a basin with cool water, can be a little longer to extend the period of time to consume.