Leyland cypress is an inter-generic hybrid between macrocarpa cypress (Cupressus macrocarpa Hartw.) and Alaska cedar (Chamaecyparis nootkatensis D.Don) Leyland cypress has become a popular tree species mainly because it is easy to establish and grow. It tolerates a wide range of sites and soils (from acid to alkaline, from clay to sand) as well as salt-laden winds, which makes it suitable for planting in coastal areas. The species is frost hardy and has survived frosts of up to -20°C in the Southwest ofthe United States. Growth rates are relatively high especially in moist, fertile soils and the plants respond well to trimming.