That claim is partly true. Fresh blueberries can last longer with proper storage, but “months” is generally unrealistic for ordinary fresh blueberries in a home refrigerator. They typically keep for around 1–2 weeks when stored properly.
How to make blueberries last as long as possible
- Don’t wash them immediately
Moisture encourages mold. Wash berries just before eating unless your specific storage method calls for washing. - Remove damaged berries
One moldy or crushed berry can spread spoilage to others, so discard damaged berries promptly. - Keep them refrigerated
Store them in the refrigerator in a breathable container. Avoid sealing wet berries in an airtight container. - Keep them dry
If condensation develops, gently dry the container and berries with clean paper towels. - For months of storage, freeze them
Spread dry blueberries in a single layer on a tray, freeze until firm, then transfer them to a freezer-safe bag or container. Frozen blueberries can maintain good quality for many months.
Bottom line: For truly long-term storage, freezing—not a special refrigerator trick—is the reliable method. If fresh blueberries develop visible mold, don’t simply rinse it off; discard the affected berries.
