How Long Does Dried Oregano Last?

Dried oregano's potency fades over one to three years even properly stored, driven by the slow loss of its essential oils to evaporation rather than any bacterial spoilage risk — light and heat near a stove accelerate that fade considerably, which is why where the jar is kept matters more than how long it's technically been open.

Crushing a pinch of the dried leaves between two fingers and smelling the result is the most reliable real-time check for remaining potency, since a jar that's faded still looks essentially the same, dry green flakes, whether it's fresh or years old. Oregano that's picked up moisture at some point, evidenced by clumping or a musty smell rather than its normal herbal scent, should be discarded outright rather than judged on potency alone, since that moisture creates a mold risk a purely faded jar doesn't have.

Oregano bought in a larger container than will realistically be used within a year or two is often a false economy, since the extra volume just sits losing potency before it's ever used — a smaller container replaced more often generally delivers more actual flavor per use than one big jar that outlives its useful potency.

A jar of oregano purchased from a bulk spice section, rather than a sealed commercial jar, often starts with somewhat less potency already, since bulk bins are typically exposed to more light and air during store display than a factory-sealed container.

See Dried Oregano's full storage & shelf-life guide (with spoilage signs) →