Cunila origanoides aka American Dittany

Cunila origanoides is a mint-family plant called common or American dittany. It comes from the central and eastern United States. This perennial grows in dry woods, clearings, thickets, and prairies. It also occurs on rocky slopes and open ground. Its leaves give off a strong mint scent when crushed.

Garden plants reach about 0.75–1.5 feet [0.23–0.46 metres] tall and wide. Missouri Botanical Garden also describes plants as short as 0.67 feet [0.20 metres]. The plant has many branches and thin, wiry, square stems. Stems range from purple-green to a deep red-purple. They may feel smooth or bear a few hairs. Pairs of simple leaves grow along the stems. The leaves are oval or lance-shaped, with pointed tips. Their bases are heart-shaped, and their edges have small teeth. Green leaves can turn deep red-purple after the first frost.

Small flower clusters grow at stem tips and leaf joints. Each tubular flower has two lips and five lobes. The blooms are lavender or pink, with white forms rare. Two long stamens and the pistil project beyond the flower. Missouri Botanical Garden lists bloom from July through September. NC State places most bloom in August and September. Chicago Botanic Garden also records flowers in May and June. Bees, butterflies, and skippers visit for nectar and pollinate them. Each flower later forms four tiny brown nutlets in fall. Wind carries these small fruits away.

Grow dittany in sun or partial shade with good drainage. It favors dry, sandy ground but also grows in loam. It suits shallow, rocky soil and tolerates drought. NC State lists acid soil as suitable. Sources place its hardiness in USDA zones 5–8. Growth is moderate, and routine care needs are low. Seeds, stem cuttings, and division offer ways to raise more plants. It fits herb beds, rock gardens, and the fronts of borders. Native plant gardens and slopes also suit it. Frost can force sap from stems, where it freezes into ice shapes.

Sources report no major pest or disease concerns. Plants may spread strongly and become loose or untidy. Fresh or dried leaves make a mint-flavored tea. Native Americans used the plant in medicine. Folk uses include leaf tea for colds, fever, and headaches. These records describe traditional use, not proof of treatment benefits. The plant also yields an essential oil used as an antiseptic. Bunches have been used to deter insects, including horseflies. Plants For A Future reports no known hazards.