A tender to borderline hardy, upright, branching, woody-based perennial, often grown as an annual, with ovate, hairy, toothed, aromatic, mid-green leaves and dark purple stems bearing whorled spikes of fragrant, two-lipped, pink flowers from midsummer to mid-autumn.
Height 1.5m (5ft), Spread 50cm (1.5ft), 2-5 years to maturity.