Prized for minty foliage used to make tea, and for long-blooming clusters of two-lipped flowers. Plant near a garden path where you can brush against the leaves and savor their scent. Calamints need well-drained soil.
C. grandiflora. LARGE-FLOWERED CALAMINT. Zones US, MS, LS, CS; USDA 6-9. Native from Mediterranean region to Iran. Creeping rhizomes produce a clump to 2 ft. tall and wide, with slender stems and 112-in. pink flowers in summer. Better with some shade.
C. nepeta. LESSER CALAMINT. Zones US, MS; USDA 6-7. Native from Mediterranean region to Great Britain. Slow growth to 112 ft. high, 212 ft. wide. Many tough, slender stems grow outward, then erect. Upper portion of the plant carries a profusion of 12-in. pale lilac-to-white flowers in late summer and fall. C. n. nepeta is a bit larger and more vigorous, with slightly larger flowers. 'Montrose White' grows 12-15 in. tall and wide and blooms nonstop from early summer to fall. 'Blue Cloud' has light blue flowers.