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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.
It will grow in a windy site so can provide an excellent shelter belt. Leylandii can be trimmed to a hedge of any size (we've kept one at 4ft/120cm tall for 25 years). As a specimen tree it ha s an elegant, columnar form with dense foliage.A well-kept Leylandii hedge is a living wall that can: 1  Improve privacy.t will grow in a windy site so can provide an excellent shelter belt. Leylandii can be trimmed to a hedge of any size (we've kept one at 4ft/120cm tall for 25 years). As a specimen tree it ha s an elegant, columnar form with dense foliage. A well-kept Leylandii hedge is a living wall that can: 1  Improve privacy.