Offering pinkish-white late summer blooms and winter structural interest, this fragrant native perennial prefers full sun and fertile, medium moist soil. Mountain mint grows in a clump form, often reaching 3 feet in both width and height. It spreads more slowly than other mints and is excellent for naturalizing. When crushed, the dense, dark green foliage gives off a delightful scent of peppermint which is especially welcome in the winter. Mountain mint is a favorite of butterflies and bees.