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Leyland Cypress (x Cupressocyparis leylandii)

Leyland Cypress 'Green Spire' Tree Leyland Cypress is a readily recognizable tree that is commonly used for landscaping in our area. Three well-developed specimens planted in 1967 are present in the Arboretum's Conifer Collection, and others are planted at the junction of Arboretum Drive and Valley Road. Leyland Cypress is fast-growing (3-4 ft. a year) and is used for hedges, screens, windbreaks, and Christmas trees. It was developed as a cross between two species belonging to different genera - Monterey Cypress (Cupressus macrocarpa) from Northern California and the Nootka False Cypress (Chamaecyparis nootkatensis) from the Pacific Northwest. The trees in the Conifer Collection are the 'Green Spire' cultivar, and those at Arboretum Drive are the 'Leighton Green' cultivar.

Leyland Cypress 'Green Spire' Foliage 'Green Spire' is fast growing, reaching heights of 70 to 100 ft. It has a columnar form and dense dark green to blue-green foliage borne on flattened quadrangular branchlets. The 'Leighton Green' cultivar, developed at the Leighton Hall estate in Wales, is from a cross between a male Nootka False Cypress and a female Monterey Cypress. It has thick, dark green, scale-like foliage, and an oval to columnar form. Although 'Leighton Green' may produce viable seeds (uncommon for a cross between two genera), it is usually propagated from cuttings. It's fast growth rate and form make it attractive for use as Christmas trees.

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University of Tennessee - Forest Resources AgResearch and Education Center
901 South Illinois Avenue, Oak Ridge, Tennessee 37830 · Telephone: 865-483-3571 · Email: UTforest@utk.edu