how long will sour cream stay good
The Shelf Life of Sour Cream. According to the USDA, sour cream (opened or unopened) is good for up to three weeks after the sell-by date, as long as it's been stored in the refrigerator. Inspect your sour cream to make sure it hasn't developed mold, an off color or an off smell, and if nothing seems amiss, consider it safe to use.