How should I store catnip to keep it fresh and potent?

Proper storage makes a real difference to how effective your catnip remains over time. Nepetalactone — the active compound — is volatile and gradually evaporates when catnip is exposed to air, sunlight, or heat.

The best way to store catnip is in an airtight glass or plastic container, kept in a cool, dark cupboard away from direct sunlight and humidity. For even better longevity, you can store it in the refrigerator — the cold temperature slows the evaporation of nepetalactone and keeps the catnip fresh and potent for longer.

Properly stored catnip typically remains effective for six to twelve months. A simple test: if you open the container and the herbaceous, minty aroma is strong and sharp, the catnip is still good. If the scent has largely faded, it's time to get a fresh batch.