While you *can* store dried mint with other herbs, it's generally not recommended because mint's strong aroma can overpower the flavors of more delicate herbs. Storing them separately helps preserve the individual flavor profiles.
Dried herbs are best stored in airtight containers in a cool, dark, and dry place. This helps to preserve their flavor and potency. However, some herbs have stronger aromas than others. Mint, in particular, has a very potent and distinctive scent and flavor due to its high concentration of volatile oils. When stored with other herbs, these oils can transfer, causing the other herbs to take on a minty flavor and aroma, even if that's not desired. This is especially true for more delicate herbs like basil, oregano, or thyme. To prevent flavor contamination, it's best to store dried mint in its own separate container. This ensures that each herb retains its unique characteristics and can be used to its full potential in your cooking. Consider using glass jars with tight-fitting lids or resealable plastic bags for optimal storage.
To test if your dried herbs are still potent, crush a small amount in your hand. If the aroma is weak or nonexistent, it's time to replace them. Freshly dried herbs will have a much stronger and more vibrant scent.