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Publication #ENH381

Cupressus arizonica var. arizonica: Arizona Cypress1

Edward F. Gilman and Dennis G. Watson2

Introduction

This rapidly-growing North American native evergreen reaches 30 to 40 feet in height with a 15 to 25-foot-spread. It is referred to as Cupressus glabra by some botanists. The green foliage has a silver/gray shimmer and the branches are more open than most other species of juniper. The inconspicuous flowers are followed by small, 1-inch cones which persist on the tree. The peeling brown bark becomes gray with age. Arizona cypress is often used as a specimen or windbreak planting and is a common sight in west Texas and the southern High Plains where it tolerates the hot, dry conditions with ease.

Figure 1. 

Middle-aged Cupressus arizonica var. arizonica: Arizona Cypress


Credit:

Ed Gilman, UF/IFAS


[Click thumbnail to enlarge.]

General Information

Scientific name: Cupressus arizonica var. arizonica
Pronunciation: koo-PRESS-us air-ih-ZAWN-ih-kuh variety air-ih-ZAWN-ih-kuh
Common name(s): Arizona cypress
Family: Cupressaceae
USDA hardiness zones: 7A through 9B (Fig. 2)
Origin: native to North America
Invasive potential: weedy native
Uses: specimen; screen
Availability: somewhat available, may have to go out of the region to find the tree

Figure 2. 

Range


[Click thumbnail to enlarge.]

Description

Height: 30 to 40 feet
Spread: 15 to 25 feet
Crown uniformity: symmetrical
Crown shape: columnar, pyramidal
Crown density: dense
Growth rate: moderate
Texture: fine

Foliage

Leaf arrangement: opposite/subopposite (Fig. 3)
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, blue or blue-green
Fall color: no color change
Fall characteristic: not showy

Figure 3. 

Foliage


[Click thumbnail to enlarge.]

Flower

Flower color: yellow
Flower characteristics: not showy

Fruit

Fruit shape: round
Fruit length: .5 to 1 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; showy; typically one trunk; thorns
Pruning requirement: little required
Breakage: susceptible to breakage
Current year twig color: green
Current year twig thickness: thin
Wood specific gravity: unknown

Culture

Light requirement: full sun
Soil tolerances: sand; loam; acidic; alkaline; well-drained
Drought tolerance: high
Aerosol salt tolerance: unknown

Other

Roots: not a problem
Winter interest: no
Outstanding tree: no
Ozone sensitivity: unknown
Verticillium wilt susceptibility: resistant
Pest resistance: sensitive to pests/diseases

Use and Management

It can be found growing with a single trunk or in clumps. It is probably best used in landscapes which are not irrigated since it is susceptible to juniper blight. Many locations in the eastern part of the country are too humid to successfully grow this tree. It is most often found in the west and in the drier parts of Texas and Oklahoma.

Arizona cypress should be grown in full sun on well-drained soil. Although it will tolerate clay soil, the shallow roots will not gain as secure an anchor as they might in other soils and the tree may, as a result, topple over during wind and rainstorms.

Cultivars of Cupressus arizonica include: 'Compacta'—low, conical; 'Gareei'—silver blue foliage; 'Glauca'—leaves silvery-grey; 'Greenwood'—medium silver/grey/green; 'Oblonga'—horizontal branches, producing oblong effect, leaves grey/green; 'Verhalenii'—leaves bright glaucous-blue, softer and more graceful than wild forms; 'Watersii'—narrowly pyramidal, compact.

Propagation is by seed or grafting.

Pests

Bagworms.

Diseases

Juniper blight, especially in cool, humid regions.

A stem canker has devastated large numbers of trees in various parts of the country.

Footnotes

1.

This document is ENH381, one of a series of the Environmental Horticulture Department, UF/IFAS Extension. Original publication date November 1993. Reviewed June 2014. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

Edward F. Gilman, professor, Environmental Horticulture Department; Dennis G. Watson, former associate professor, Agricultural Engineering Department, UF/IFAS Extension, Gainesville FL 32611.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.