What is the difference between arborvitae and Leyland cypress?

The Leyland cypress is a popular tree for use in landscaping, due to its fast growth rate and pyramidal form. There is, however, one significant difference between this tree and the arborvitae: the Leyland cypress grows much taller, with some specimens reaching 100 feet tall. The arborvitae, while also pyramidal, is thinner, with branches spreading to a width of 10 to 15 feet. The Leyland cypress plumps out to 20 feet wide, making it a better choice for landscapes where a taller tree is desired. Both trees are hardy in USDA zones 5 through 9.
If you’re looking for a fast-growing evergreen to add height and interest to your landscape, the Leyland cypress is a good choice. Be aware, however, that this tree can be quite messy, dropping needles and cones year-round. And while it’s drought-tolerant once established, it does need regular watering during its first few years. If you don’t mind dealing with a little extra cleanup and have room for a tall tree, the Leyland cypress is worth considering.
Whichever tree you choose, be sure to plant it in a location where it will have plenty of room to grow. Both the Leyland cypress and the arborvitae make handsome additions to any landscape, but they do require plenty of space to reach their full potential.