Does Mustard Need to Be Refrigerated?

According to French's, “The product will generally maintain good flavor quality for two to three months after that date, if refrigerated. While refrigeration will help maintain flavor, it's not necessary to refrigerate if you prefer to consume your mustard at room temperature.

How long can mustard be left out of the fridge?

At room temperature, the mustard will keep its quality for about 1 to 2 months, while refrigerated it should stay in good shape for about a year.

What happens if you don't refrigerate mustard after opening?

As long as the mustard doesn't contain fruits or vegetables, it has enough acid in it as a preservative. Yellow, Dijon, or even whole-grain can be put away in the cabinet for up to two months.