Whereas many essential oils have a shelf life limited to just a few years under even the best conditions, Patchouli actually improves with age.
Many distillers, suppliers, and aromatherapists assert Patchouli has a twenty-year-plus shelf-life.
Indeed, I wasn’t much of a fan of Patchouli until I encountered the intoxicating fragrance of a vintage Patchouli that was originally distilled over twenty years ago!