A low-growing evergreen shrub of well-drained acidic soils. It is found on moorlands and mountains, and on blanket mire where it can increase greatly after burning or where dry surfaces have been bared by erosion (Rodwell, 1991b). 0-1270 m (Cairngorms, S. Aberdeen).
A low-growing evergreen shrub, favouring moderately well-drained acidic soils and occurring in dwarf shrub and Racomitrium heaths, rock crevices and dry heather moor, including areas of late snow-lie. Usually montane, occurring from 610 m to 1130 m in the Cairngorm (Easterness), but formerly on coastal dunes at Tain (E. Ross).