Perennial Herb: Great between stepping stones. Forms a dense carpet. Can take foot traffic. Releases a very fresh cleansing aroma when brushed against. This diminutive mint has long been used as flavoring for crème de menthe liqueur. Bloom time: summer. Bloom color: lavender. Height: less then an inch. Spread: indefinite (but not invasive). Exposure: sun-part shade: Water: moderate-moist. USDA Z7.