Sandys Nursery Online Thuja Green Giant Arborvitae Lot of 2 Starter Plants Rapidly-growing, broad pyramidal evergreen tree has medium to dark green foliage. The fastest growing tree Sandys Nursery Online offers. Privacy Screen-Height: 30-50 feet & Width: 12-16 feet Growth Habit: Pyramidal evergreen tree. Foliage: Medium to dark green. Hardiness Zone: 5-8 Ships: (2) Starter Plants 6-10 inches tall each in a 2" cell with soil.