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x Hesperotropsis leylandii 'Haggerston Gray': 'Haggerston Gray' Leyland Cypress

Edward F. Gilman, Dennis G. Watson, Ryan W. Klein, and Deborah R. Hilbert

Introduction

A rapidly growing evergreen when young, Leyland cypress will easily grow three to four feet per year, even on poor soils, and will ultimately attain a majestic height of 50 feet or more in the west, perhaps somewhat shorter in the east. ‘Haggerston Gray' Leyland cypress forms a narrow, more open, oval outline than the species when left unpruned, but the graceful upturned branchlets will tolerate severe trimming to create a formal hedge, screen, or windbreak. The fine, feathery, gray-green foliage is composed of soft, pointed leaves on flattened branchlets and are dark blue-green when mature, soft green when young. Leyland cypress quickly outgrows its space in small landscapes and is too big for most residential landscapes unless it will be regularly trimmed. Although it can be sheared into a tall screen on small lots, Leyland cypress should probably be saved for large-scale landscapes where it can be allowed to develop into its natural shape.

Middle-aged x Hesperotropsis leylandii 'Haggerston Gray': 'Haggerston Gray' leyland cypress.
Figure 1. Middle-aged x Hesperotropsis leylandii 'Haggerston Gray': 'Haggerston Gray' leyland cypress.
Credit: UF/IFAS

General Information

Scientific name: x Hesperotropsis leylandii

Pronunciation: x hes-per-oh-trop-sis lay-LAN-dee-eye

Common name(s): 'Haggerston Gray' Leyland Cypress

Family: Cupressaceae

USDA hardiness zones: 6A through 10A (Figure 2)

Origin: not native to North America

Invasive potential: not assessed/incomplete assessment

Uses: specimen; screen; hedge; highway median; Christmas tree

Range.
Figure 2. Range.
Credit: UF/IFAS

Description

Height: 40 to 50 feet

Spread: 15 to 25 feet

Crown uniformity: symmetrical

Crown shape: oval, pyramidal, columnar

Crown density: dense

Growth rate: fast

Texture: fine

Foliage

Leaf arrangement: opposite/subopposite

Leaf type: simple

Leaf margin: entire

Leaf shape: scale-like

Leaf venation: none, or difficult to see

Leaf type and persistence: evergreen

Leaf blade length: less than 2 inches

Leaf color: green

Fall color: no color change

Fall characteristic: not showy

Flower

Flower color: no flowers

Flower characteristics: no flowers

Fruit

Fruit shape: round

Fruit length: less than .5 inch

Fruit covering: dry or hard

Fruit color: brown

Fruit characteristics: does not attract wildlife; not showy; fruit/leaves not a litter problem

Trunk and Branches

Trunk/bark/branches: branches don't droop; not showy; typically one trunk; thorns

Pruning requirement: little required

Breakage: resistant

Current year twig color: green

Current year twig thickness: thin

Wood specific gravity: unknown

Culture

Light requirement: full sun, partial sun or partial shade

Soil tolerances: sand; loam; clay; acidic; alkaline; well-drained

Drought tolerance: high

Aerosol salt tolerance: moderate

Other

Roots: not a problem

Winter interest: no

Outstanding tree: yes

Ozone sensitivity: unknown

Verticillium wilt susceptibility: resistant

Pest resistance: sensitive to pests/diseases

Use and Management

Leyland cypress grows in full sun on a wide range of soils, from acid to alkaline, but looks its best on moderately fertile soil with sufficient moisture. It is surprisingly tolerant of severe pruning, recovering nicely from even severe topping (although this is not recommended), even when half the top is removed. It grows well in clay soil and tolerates poor drainage for a short period of time. It also is very tolerant of salt spray.

Some of the other cultivars include: ‘Castlewellan', a more compact form with gold-tipped leaves, excellent for hedges in cool climates; ‘Leighton Green', dense branching with dark green foliage, columnar form; ‘Naylor's Blue', blue-grey foliage, columnar form; ‘Silver Dust', wide-spreading form with blue-green foliage marked with white variegations.

Propagation is by cuttings from side growths.

Pests

Bagworm can defoliate a tree in a week or two and can be quite serious.

Diseases

A canker affects the tree following drought; a foliage fungus occasionally infects foliage. This plant is not recommended for planting in California due to the severity of this canker disease. Perhaps the disease will stay in the western United States.

Publication #ENH-829

Release Date:March 27, 2024

Related Collections

Part of Southern Trees Fact Sheets

  • Critical Issue: Agricultural and Food Systems
Organism ID

About this Publication

This document is ENH-829, one of a series of the Department of Environmental Horticulture, UF/IFAS Extension. Original publication date November 1993. Revised December 2006 and March 2024. Visit the EDIS website at https://edis.ifas.ufl.edu for the currently supported version of this publication.

About the Authors

Edward F. Gilman, professor emeritus, Department of Environmental Horticulture; Dennis G. Watson, former associate professor, Department of Agricultural and Biological Engineering; Ryan W. Klein, assistant professor, arboriculture, Department of Environmental Horticulture; and Deborah R. Hilbert, UF/IFAS Gulf Coast Research and Education Center; UF/IFAS Extension, Gainesville, FL 32611.

Contacts

  • Michael Andreu
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