Leyland Cypress Origin: A Hybrid Born in Wales, Not a Native

Leyland cypress (× Cupressocyparis leylandii) is a hybrid between Monterey cypress (Cupressus macrocarpa) and Alaska cedar (Chamaecyparis nootkatensis). Both parents are native to the North American Pacific coast, but the cross occurred spontaneously at Leighton Hall arboretum in Wales in 1888.

Rapid Spread

The hybrids' beauty and fast growth made them popular across England and Europe. They reached the U.S. South in 1965 via Brookgreen Gardens, SC, and Clemson University. Easy propagation fueled massive nursery production—millions sold in under 50 years.

Key Points

• Not native anywhere; a man-made hybrid.
• Parents are Pacific coast natives.
• First hybridized in Wales, 1888.
• Introduced to Southeast US in 1965.

Clemson University maintains historic Leyland cypress plantings for reference.