Mustard
The answer
Opened mustard lasts 1 year in the fridge.
Caution Refrigerate after opening for best quality and the 1-year window.
How long it keeps
Fridge (40°F) 1 year safe window
Freezer (0°F) Do not freeze best quality
Room temp 2 hours max then discard
Discard Discard if moldy, fermented-smelling, or fizzing.
The answer
Unopened mustard keeps 2 years past date in the pantry.
How long it keeps
Fridge (40°F) Not needed safe window
Freezer (0°F) Do not freeze best quality
Pantry 2 years past date OK stored right
Discard Discard bulging, leaking, or badly dented containers.
By state & packaging
State Fridge Freezer
Opened, refrigerated 1 year Do not freeze
Unopened, pantry — —
Signs it has gone bad
✕ Mold at the cap or surface
✕ Fermented or off smell
✕ Separation with sour odor
FAQ
How long does opened mustard last?
About 1 year refrigerated per FoodKeeper guidance. Follow the package date if it is shorter.