Emerald green arborvitae, on the other hard ... Hardy in USDA zones 5 through 8, 'Green Giant' tolerates many types of soil as long as it's somewhat loose and drains well. It is drought-tolerant ...

Depending on the variety, arborvitae often reach 8 to 20 feet, sometimes taller ... He says an alternative requiring less moisture is the green giant arborvitae — a hybrid of varieties ...