How fast does emerald arborvitae grow?

Emerald arborvitae (Thuja occidentalis 'Smaragd') typically grows at a rate of about 12 to 15 inches per year under optimal conditions. This evergreen tree prefers well-drained soil and full sun to partial shade, which can enhance its growth rate. With proper care, it can reach heights of 10 to 15 feet and spread 3 to 4 feet wide over time. Regular watering and fertilization can also promote healthy growth.