A highly structured looking arborvitae, “Green Giant” is hardy in U.S. Department ... together -- they should be at least 5 feet apart for a hedge -- or not give them enough vertical room.
"Green Giant" arborvitae makes a good hedge or specimen plant. This giant, conical evergreen is hardy from U.S. Department of Agriculture plant hardiness zones 5 to 8b. Choosing the Correct "Green ...