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Publication #ENH480

 

Juniperus ashei: Ashe Juniper1

Edward F. Gilman and Dennis G. Watson2

Introduction

This multi-stemmed, native North American tree reaches 35 to 40 feet in height and has fragrant, resinous leaves. Although the flowers are small and insignificant, the fruits which follow, ripen in August and September into a large, blue, berry-like cone which is relished by wildlife. The bark of Ashe Juniper peels off in long, thin strips, which are used by birds for nesting material. The wood of Ashe Juniper is strong enough to have been used for posts and poles.

Figure 1. 

Mature Juniperus ashei: Ashe Juniper


[Click thumbnail to enlarge.]

General Information

Scientific name: Juniperus ashei
Pronunciation: joo-NIP-er-us ASH-ee-eye
Common name(s): Ashe Juniper, Mountain-Cedar
Family: Cupressaceae
USDA hardiness zones: 7A through 9A (Fig. 2)
Origin: native to North America
Invasive potential: little invasive potential
Uses: tree lawn 3-4 feet wide; tree lawn 4-6 feet wide; tree lawn > 6 ft wide; street without sidewalk; screen; reclamation; specimen; highway median; Bonsai
Availability: somewhat available, may have to go out of the region to find the tree

Figure 2. 

Range


[Click thumbnail to enlarge.]

Description

Height: 35 to 40 feet
Spread: 15 to 25 feet
Crown uniformity: irregular
Crown shape: columnar, pyramidal
Crown density: open
Growth rate: moderate
Texture: fine

Foliage

Leaf arrangement: opposite/subopposite (Fig. 3)
Leaf type: simple
Leaf margin: terminal spine
Leaf shape: scale-like
Leaf venation: none, or difficult to see
Leaf type and persistence: fragrant, evergreen
Leaf blade length: less than 2 inches
Leaf color: green
Fall color: no color change
Fall characteristic: not showy

Flower

Flower color: unknown
Flower characteristics: not showy

Fruit

Fruit shape: cone, round, oval
Fruit length: less than .5 inch
Fruit covering: fleshy
Fruit color: blue
Fruit characteristics: attracts birds; 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: resistant
Current year twig color: green, gray, reddish
Current year twig thickness: thin
Wood specific gravity: unknown

Culture

Light requirement: full sun
Soil tolerances: clay; sand; loam; alkaline; acidic; 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: free of serious pests and 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.

Ashe Juniper should be grown in full sun on well-drained soil and easily tolerates alkaline soil.

Propagation is by seed.

Pests

No pests are of major concern.

Diseases

Juniper blight can cause leaf discoloration and defoliation. Ashe Juniper is reportedly resistant to Cedarapple rust.

Footnotes

1.

This document is ENH480, one of a series of the Environmental Horticulture, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date November 1993. Revised December 2006. Reviewed May 2011. 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, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, 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 extension publications, contact your county Cooperative Extension service.

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