A wonderful evergreen tree for creating a natural fence, Italian cypress (Cupressus sempervirens) has a very upright, tall and narrow form with attractive blue-green foliage. Keep in mind that mites, bagworms, and root rot can be common issues when growing Italian cypress, says Abdi. This tree generally does better in drier climates.

Zone: 7 to 10
Mature size: 40 to 70 feet tall x 3 to 6 feet wide
Care requirements: Full sun; well-draining soil