Rockspray cotoneaster is a coarse, dense, slow-growing, shrub that reaches 2-3 feet tall and 6-8 feet wide. The Latin name which includes horizontalis refers to its horizontal spreading habit. In its southern reaches, it is semi-evergreen to evergreen. Grows best in well drained, loose, moist, loamy soil in full sun to part shade., Slow-growing, Cotoneaster horizontalis (Rock Cotoneaster) is a spreading, deciduous shrub with flat and stiff, regularly-branched sprays in a strict herring-bone pattern., Cotoneaster horizontalis is a short shrub with a spreading habit, growing to 1 metre (3 ft 3 in) tall by 1.5 metres (4 ft 11 in) wide. It is cultivated for its flat, symmetrical sprays of glossy green, deciduous leaves 6 to 12 mm long. [2], Rockspray cotoneaster, also known as wall cotoneaster, is a horizontally spreading shrub that offers four-season interest, producing light-pink flowers in late spring, glossy green leaves in summer, and attractive reddish-orange to burgundy foliage and berries in the autumn., Leaves small, about 10 mm long, lustrous dark green, may become dark red in fall. Small pink flowers (5 mm diam.), single or in pairs in spring. Fruit small (5 mm), bright red, in late summer and fall. Sun to part shade. Prefers well-drained, loose, fertile soil with adequate moisture, but tolerates dry, poor soils, and wind, pH adaptable., C. horizontalis is a low, flat, dense shrub with horizontally spreading branches creating a tiered effect. A generally trouble-free cotoneaster, although can be subject to the troubles of Rosaceous plants on occasion..