Whether you need a hedge of evergreen privacy trees or only 1 tree to provide a little blockage, here our the 5 best evergreen plants for you. Need privacy but can't use a wide-growing tree? Then the American Pillar Arborvitae is the tree for you. Growing only up to 20-30 feet tall but staying approximately 3 to 4 feet wide, this evergreen tree will provide you with the view block you need and not overwhelm the rest of your landscape. A smaller, more narrow evergreen tree that is becoming a customer favorite, the Thin Man Arborvitae grows in the 12 to 15-foot height range and only spreads 3 to 5 feet wide. Perfect for enclosing smaller outdoor spaces without appearing overwhelming.