Slim Evergreen Trees

Emerald Green Arborvitae

• The emerald green arborvitae grows in USDA Plant Hardiness Zone 2 to Zone 7. While it can become bushy, with pruning it can be trained to grow tall and slim. A mature emerald green arborvitae grows to 14 feet and, if left alone, will develop a spread of up to 4 feet.

Rocky Mountain Juniper

• Central and southern United States is the home of the Rocky Mountain juniper, the slimmest of the junipers. It is slow-growing, but will eventually reach a height of 40 feet. It can be pruned and contained to 3 feet in width. It has blue tones and blue-gray berries, and it needs a well-drained, dry soil and full sun. It grows best in Zone 4A to Zone 9A. Several cultivars of the Rocky Mountain juniper are available, including "Skyrocket" and "Gray Gleam."

Italian Cypress

• A walk along the Mediterranean seaside will reveal the majestic Italian cypress. Tall and slim, the tree needs full sun, but it is easy to grow and doesn't require a lot of maintenance. It prefers neutral to slightly acidic soils and needs good drainage. The Italian cypress grows best in Zone 8 to Zone 10. It is a tall tree and can grow up to 40 feet without trimming. Its spread can reach 5 feet.

Golden Lemon-Scented Conifer

• The golden lemon-scented conifer grows in a cone-shaped column. When the sun shines, its needles look golden-yellow in color. The golden lemon holds its color year-round. Pruning should be done yearly. Pass by and pick a needle or just linger, and the scent of lemon will surround you. Golden lemon-scented conifer grows best in Zone 7 to Zone 10.

Leyland Cypress

• The Leyland cypress is tall and slim, and has narrow needles. It is a fast-growing conifer and can be used as a privacy fence, hedge or wind screen. Leyland cypress needs pruning to maintain its narrow width. Left alone, these trees grow up to 60 feet tall and 12 feet wide. They retain their foliage all year. The Leyland cypress grows best in Zone 6 to Zone 10.