Originally introduced to the United States during the early 19th century, Peppermint oil Idaho played a quintessential role in founding the herb’s widespread popularity among consumers. Idaho peppermint grows large and tall within the fertile soil of the region’s river valleys, ranking among some of the highest-quality mint crops in the entire industry. The oil has an intensely fresh and green aroma, with a grassy and minty top note that eventually dissipates into a sweet and clean dry down.