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Suitable for U.S. Department of Agriculture plant hardiness zones 6 through 9, Leyland cypress is a naturally fast grower, growing 20 to 30 feet tall in the first 10 years, and eventually reaching over 50 feet tall and 20 feet wide.
Leyland Cypress â Growth Rate. Q: We want to plant Leyland cypress trees along both sides of our back yard, for screen. My question is how much do these trees grow a year? I was told the first year they sleep, the second year they creep, and the third year they leap. A: Your information is correct: Leyland cypress may grow just a foot or two in the first year but might accelerate to three feet per year once it becomes established. If you want the fastest screening, spend lots of time preparing the site before you plant them.