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Publication #ENH472

Ilex x'Nellie R. Stevens ': 'Nellie R. Stevens' Holly1

Edward F. Gilman and Dennis G. Watson2

Introduction

A hybrid between Ilex aquifolium and Ilex cornuta , Nellie R. Stevens Holly has kept the best traits of both parents, with lustrous, dark green leaves and abundant fruit production. Leaves are among the darkest of any plant. Vigorous and fast-growing, this Holly quickly grows into an attractive, broad pyramidally-shaped evergreen, 20 to 30 feet high and 10 to 12 feet wide. It will need a male Holly nearby to ensure pollination and production of the vivid red berries. Chinese Holly, Ilex cornuta will flower at the proper time and may be used for this purpose.

Figure 1. 

Middle-aged Ilex x 'Nellie R. Stevens': 'Nellie R. Stevens' Holly


Credit:

Ed Gilman


[Click thumbnail to enlarge.]

General Information

Scientific name: Ilex x
Pronunciation: EYE-lecks
Common name(s): 'Nellie R. Stevens' Holly
Family: Aquifoliaceae
USDA hardiness zones: 6A through 9B (Fig. 2)
Origin: not native to North America
Invasive potential: little invasive potential
Uses: sidewalk cutout (tree pit); parking lot island < 100 sq ft; parking lot island 100-200 sq ft; parking lot island > 200 sq ft; tree lawn 3-4 feet wide; tree lawn 4-6 feet wide; tree lawn > 6 ft wide; street without sidewalk; screen; hedge; urban tolerant; highway median; container or planter; Christmas tree
Availability: not native to North America

Figure 2. 

Range


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Description

Height: 20 to 30 feet
Spread: 10 to 15 feet
Crown uniformity: symmetrical
Crown shape: pyramidal, oval, upright/erect
Crown density: dense
Growth rate: moderate
Texture: medium

Foliage

Leaf arrangement: alternate (Fig. 3)
Leaf type: simple
Leaf margin: entire, pectinate, spiny
Leaf shape: oblong
Leaf venation: brachidodrome, pinnate
Leaf type and persistence: evergreen
Leaf blade length: 2 to 4 inches
Leaf color: green
Fall color: no color change
Fall characteristic: not showy

Figure 3. 

Foliage


[Click thumbnail to enlarge.]

Flower

Flower color: white/cream/gray
Flower characteristics: not showy

Fruit

Fruit shape: round
Fruit length: less than .5 inch
Fruit covering: fleshy
Fruit color: red
Fruit characteristics: does not attract wildlife; showy; fruit/leaves not a litter problem

Trunk and Branches

Trunk/bark/branches: branches droop; not showy; typically multi-trunked; thorns
Pruning requirement: little required
Breakage: resistant
Current year twig color: green
Current year twig thickness: medium
Wood specific gravity: unknown

Culture

Light requirement: full sun, partial sun or partial shade
Soil tolerances: clay; sand; loam; acidic; slightly alkaline; well-drained; extended flooding
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

Nellie R. Stevens Holly is one of the best Hollies for the warmer regions of the country, and is ideally-suited for use as a screen or border. It maintains a nice, uniform shape without pruning. It is now becoming widely available and is one of the best plants for making a screen due to its very dense, symmetrical habit. Locate it where it will have enough space to spread since trees become wide at the base. Lower branches can be removed to create a clear trunk for planting along a walk or near a patio, but the tree really shines as a specimen or screen allowed to develop with all branches intact to the ground. Nursery operators grow the tree either as a multi-stemmed clump or with one central leader. Multi-stemmed trees may not hold up in ice storms as well as those with a central leader. Main branches on single-leadered trees are usually well-secured to the trunk, making the tree sturdy and a permanent fixture for almost any landscape.

Nellie R. Stevens Holly should be grown in full sun or partial shade on well-drained, slightly acid soil. Plants are drought-resistant once established.

Propagation is by cuttings or grafting.

Pests and Diseases

No pests or diseases are of major concern, perhaps scale on occasion.

Footnotes

1.

This document is ENH472, one of a series of the Environmental Horticulture, UF/IFAS Extension. Original publication date November 1993. Revised December 2006. Reviewed February 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.