A stoloniferous perennial from the Lamiaceae family, the spotted dead-nettle is native to Europe and Western Asia, where it inhabits cool undergrowth, shaded edges, and moist banks on humus-rich soils.
'Roseum' forms a dense and vigorous carpet, about fifteen centimeters high. Its foliage is medium green, marked by a central white spot elongated along the main vein — a more discreet variegation than that of 'Beacon Silver', but which gives the carpet an animated and luminous texture, clearly visible in full bloom.
The bilabiate flowers are a bright pink-mauve, grouped in tight whorls along the upright stems. In its natural habitat, the species blooms from April to June; in cultivation, this cultivar blooms abundantly and may resume in autumn in regions with mild summers.
It requires a cool, humus-rich soil, in shade or semi-shade, and does not tolerate prolonged summer drought well. An effective ground cover for undergrowth compositions or shaded borders.