Pycnanthemum pycnanthemoides — its species epithet a repetition of the genus name, meaning doubly dense-flowered — grows natively in dry to wet thin woodlands, thickets, and meadows across the Southeast. At 3 to 6 feet tall and about 2 feet wide, it is among the more substantial mountain mints, with the densely packed flower heads that distinguish the genus packed with small blooms from June through August. The minty fragrance from the foliage carries some distance on warm days, and bees and butterflies arrive in conspicuous numbers.

Average to dry soils suit it well, and full sun to partial shade both support healthy growth — sun producing the best flowering. For gardeners who want a large-scale pollinator plant that requires almost nothing in return, Southern Mountain Mint rewards a prominent position in a meadow garden or at the back of an informal border. Massed, the silver-green foliage in bloom creates a haze of soft color that reads well from a distance and holds the middle ground between more strident summer perennials.