Sandys Nursery Online Thuja Green Giant Arborvitae Lot of 20 Starter Plants Rapidly-growing, broad pyramidal evergreen tree has medium to dark green foliage. Privacy Screen-Height: 30-50 feet & Width: 12-16 feet Use: Windbreak or Privacy Screen. Hardiness Zone: 5-8 Ships: (20) Starter Plants each in a 2" cell 6-8" tall with soil.