Green Giant and American Pillar Arborvitae Popularity: the Workhorse of Privacy Trees

Green Giant is at least 80% of the trees demanded by privacy seekers and even higher for American Pillar for people with smaller yards or swimming pools.

The best short answer is listing out the advantages:

Pretty, uniform
Requires no maintenance, apart from watering the first year
Fast growing, 3-4’ a year for young trees is possible
Deer resistant
Diseases resistant
Responds well to pruning, easy to manage size & height

Look at the picture below with the 5 Green Giant Arborvitae. It is not possible to say what is behind them. They are perfect for providing privacy and blocking out visibility.