Pyramidal American arborvitae is a fast-growing, narrow pyramidal evergreen with bright green, soft-textured foliage that changes to a yellowish brown in the winter. It grows 12 to 25 feet tall and 3 to 6 feet wide, making it an ideal hedge or privacy screen. The foliage is susceptible to winter burn and the plant requires regular watering, especially in the heat of the summer. It can be easily pruned to maintain a neat appearance.