Herbs and spices generally don't spoil, they simply loose their potency over time. How the herbs are stored will play a role in how long they retain their potency. If stored in airtight container, such as glass jars, or our resealable bag, and kept in a cool, dark, dry place, whole herbs and spices last 3-4 years. We do provide a  "best by" date on the package which is typically more than 2 years in the future. Our resealable bags are made from a high barrier material which helps protect the contents from exposure, and preserve freshness, aroma and potency.