Millions of families love maple syrup, and it often doesn’t stay in the pantry or fridge long enough for most consumers to know whether or not it goes bad.
Quick Answer
A sealed glass bottle of maple syrup will last indefinitely, due to its high sugar content. Once opened, maple syrup will stay fresh for one year or more, if you keep it in the fridge. It can last indefinitely in the freezer. Stored at room temperature, an open bottle of maple syrup may begin to grow mold, but there is no predictable time-frame for it.