Clinopodium glabellum aka Ozark Calamint

Clinopodium glabellum belongs to the mint family, Lamiaceae. Its common names include glade calamint, limestone savory, and Niagara thyme. Kew gives its native range as Canada to the United States. It grows in a temperate climate. The RHS lists it as non-native to Britain and Ireland. The older name Calamintha glabella appears as a synonym. PFAF links its wild habitat to wet cedar glades. It also records seeps along limestone creek beds. These are damp sites with a specific setting.

Sources differ in how they describe the plant’s form. Kew classes it as a subshrub. PFAF calls it an evergreen, herbaceous perennial that forms clumps. That account gives a height of 2 feet [0.6 metres]. Its stated spread reaches about 5 feet [1.5 metres]. PFAF describes fast growth, though it also calls the clump’s spread limited. Its root system has many fine, fibrous roots. The supplied accounts give little detail about leaves or stems. They do not describe bark or fruit. PFAF records lavender flowers and describes them as showy. It gives no species-specific flowering season.

PFAF lists full sun and partial shade as suitable exposures. It reports a preference for moist or wet ground. At the same time, it specifies soil that drains well. Sandy soil, loam, and clay all appear as suitable types. Its listed soil reaction is mildly acidic. PFAF gives USDA hardiness zones 6–7. It also reports UK zone 7, without an RHS hardiness rating. Seed is the propagation method given in the supplied evidence. The accounts provide no further details on sowing or division.

In gardens, PFAF suggests this plant for bog planting. It also lists it as a fast-growing ground cover. The cover has medium density and tolerates some foot traffic. PFAF suggests its scent may hinder pests seeking nearby crops. That is a proposed use, not evidence of pest resistance. No specific pests or diseases appear in these accounts. PFAF flags concern about its restricted habitat and range. This does not establish an IUCN conservation category. It lists no known edible or medicinal uses. It also reports no known hazards. That statement alone does not confirm safety for people or pets.