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Raspberries (and blackberries and all those similar) have a short shelf life which is why you rarely see them sold in stores. They might last a day or two but go bad fast (even with refrigeration.) Blueberries also go bad quickly but can last a bit longer. Yes, refrigerate them, but don't wait too long to eat.
How long do whole blueberries last in the freezer? Properly stored, they will maintain best quality for about 10 to 12 months, but will remain safe beyond that time. The freezer time shown is for best quality only - blueberries that have been kept constantly frozen at 0â will keep safe indefinitely.