Japanese Holly - Box-leaved Holly - Ilex crenata

Ilex crenata

Plant Expert:

Michael Dirr Ilex crenata

Michael Dirr

Ilex crenata

Ilex crenata (click for large image)

Common Names:
Box-leaved Holly
Japanese Holly

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Origin:
	Japan, Korea, China and Taiwan

Sun/Water Requirements:

Can tolerate both shady and sunny conditions.
Moderate climate.

Climate / Hardiness Zones:
	Zone 5 to Zone 8

Growth:
	Range: Grows from 5' to 10'. Dirr says: "very difficult to ascertain from the literature the actual size of the species, listed as reaching 20' by various authorities; in actuality a shrub 5 to 10' high with a similar or greater spread; much-branched, dense shrub."

Flowers:
	Season(s): Spring Dirr says: "not at all showy"

Foliage:
	Broadleaf Evergreen Color: Leaves are dark green in the summer. Dirr says: "alternate, simple, elliptic or obovate, 1/2 to 1 1/4" long, 1/4 to 5/8" wide, of hard texture."

Fruit:
	Color: Black Season(s): Fall Dirr says: "somewhat inconspicuous, only female plants have fruits."

Landscape Value:

Can be used as a foundation plant.
Can be used as a hedge plant.
Can be used as a grouping plant.

Dirr says: "excellent for textural differences in foundation plantings, hedges and masses, along walks and on gradual slopes; hedges in Japan have been maintained for so long that they can be walked on; very handsome and worthwhile landscape plant; often overused and abused; often massacred with a pruning shears to produce "handsome" pieces of geometric sculpture; actually nicer if left to their own genetic control; perhaps remove an odd branch here or there for shaping, but otherwide stand back and enjoy."

Other:
	Is Urban Tolerant

Other Ilex crenata References & Articles:

Deciduous Hollies
Possumhaw holly, Ilex decidua, has an upright, spreading habit with an ultimate height of 30 feet in the wild, usually 20 ... Japanese winterberry, Ilex serrata, is native to Japan and China.

Sparkleberry
The U.S. National Arboretum presents 'Sparkleberry' holly, an improved deciduous holly for the landscape. 'Sparkleberry' ... Ilex (serrata x verticillata) 'Sparkleberry' (NA 29738, PI 378149)

Holly Questions and Answers
... evergreen foliage, you might want to try growing longstalk holly, Ilex pedunculosa. ... Many of the shrubby evergreen hollies such as Japanese holly and inkberry also lack spiny leaves, but ...

Sky Pencil
Even the smallest of spaces can accommodate this excellent and durable holly. 'Sky Pencil' Japanese Holly Botanical Name: Ilex crenata Thunb. 'Sky Pencil' (NA 57190)

Flowering Perennials That Can Grow in Full Shade
... bright colored flowers and abundant stalks of berries in the fall; Japanese Holly Fern has very glossy holly-like leaves; Japanese Painted Fern brighten the shady garden best if they can get ...

Using Evergreens as Screens in Tennessee
A few good evergreen choices for use as screens in Tennessee include Leyland cypress, Japanese Cryptomeria, White Fir, Eastern Red Cedar and American Holly.

Administration Building
And the brightly colored Japanese koi appeal to everyone, especially children. ... Light' Japanese silver grass and the deciduous 'Sparkleberry' holly bring light and warmth to the dreary days ...

Arboretum Introductions -- Listed by Name
... ‘Agena’ Ilex x koehneana ‘Ajax’ Ilex ‘Apollo’ Ilex ‘Clusterberry’ Ilex ‘Coronet’ Ilex ‘Elegance’ Ilex crenata ‘Geisha’ Ilex crenata ‘High Light’ Ilex x koehneana ‘Jade’ Ilex ‘John T. Morris’ ...

Microsoft Word - plant intro list genus.doc
... ‘Agena’ Ilex x koehneana ‘Ajax’ Ilex ‘Apollo’ Ilex ‘Clusterberry’ Ilex ‘Coronet’ Ilex ‘Elegance’ Ilex crenata ‘Geisha’ Ilex crenata ‘High Light’ Ilex x koehneana ‘Jade’ Ilex ‘John T. Morris’ ...

Microsoft Word - plant intro list common.doc
... ‘Agena’ Ilex x koehneana ‘Ajax’ Ilex ‘Apollo’ Ilex ‘Clusterberry’ Ilex ‘Coronet’ Ilex ‘Elegance’ Ilex crenata ‘Geisha’ Ilex crenata ‘High Light’ Ilex x koehneana ‘Jade’ Ilex ‘John T. Morris’ ...

Arboretum Introductions -- Listed by Genus
... ‘Agena’ Ilex x koehneana ‘Ajax’ Ilex ‘Apollo’ Ilex ‘Clusterberry’ Ilex ‘Coronet’ Ilex ‘Elegance’ Ilex crenata ‘Geisha’ Ilex crenata ‘High Light’ Ilex x koehneana ‘Jade’ Ilex ‘John T. Morris’ ...

Arboretum Fact Sheets & Award Winners
... syriacus 'Aphrodite', 'Helene', and 'Minerva' Hydrangea macrophylla 'Nigra' Ilex 'Sparkleberry' Ilex x attentuata 'Sunny Foster' Ilex crenata 'Sky Pencil' Juniperus conferta 'Blue Lagoon'

Waiting for Spring: Winter Interest at the National Arboretum
... Garden and boasts gray-green, holly-like leaves and fragrant yellow blooms. ... Hollies that are native to the United States include American holly (Ilex opaca) selections and the deciduous, ...

Herb Garden
... is the Knot Garden where dwarf versions of Japanese holly, juniper, and arborvitae are woven into a graceful ... to maturity and invites you to touch textured leaves and sniff exotic aromas.

Fern Questions and Answers
There are many forms of the Japanese painted fern, Athyrium nipponicum ‘Pictum’. ... The variegated holly fern, Arachnoides simplicior var.

Main Collections Page
(Japanese Woodland, Asian Valley, China Valley, Korean Hillside) ... (Gotelli & Watnong Collections, Spruces, Firs, Japanese Maples) Holly and Magnolia Collections National Bonsai & Penjing ...

U.S. National Arboretum: Gardens: Pest Management Tips: October
Check your broad-leaved evergreens (azalea, holly, camellia, viburnum) for southern red mite. ... red mite, similar to spruce spider mites, attack Japanese red cedars, Cyrptomeria japonica.

U.S. National Arboretum: Gardens: Pest Management Tips: October 2007
Check your broad-leaved evergreens (azalea, holly, camellia, viburnum) for southern red mite. ... red mite, similar to spruce spider mites, attack Japanese red cedars, Cyrptomeria japonica.

U.S. National Arboretum: Gardens: Pest Management Tips: October 2006
Check your broad-leaved evergreens (azalea, holly, camellia, viburnum) for southern red mite. ... red mite, similar to spruce spider mites, attack Japanese red cedars, Cyrptomeria japonica.

Ilex crenata is hardy in these areas:

Alsip, IL	Baltimore, MD	Bayside, NY
Bronx, NY	Brooklyn, NY	Brownsville, TX
Canton, MI	Chicago, IL	Cicero, IL
College Point, NY	Conneaut, OH	Corona, NY
Detroit, MI	Dorset, OH	East Claridon, OH
East Elmhurst, NY	East Greenville, PA	East Texas, PA
Easton, PA	Ecorse, MI	Elmhurst, NY
Elmwood Park, IL	Elyria, OH	Emmaus, PA
Evergreen Park, IL	Ferndale, MI	Florence, SC
Flushing, NY	Forest Hills, NY	Fort Eustis, VA
Fresh Meadows, NY	Glen Burnie, MD	Gwynn Oak, MD
Harper Woods, MI	Harrison Township, MI	Highland Park, MI
Hunt Valley, MD	Jackson Heights, NY	Leasburg, NC
Lexington, NC	Liberty, NC	Linwood, NC
Little Neck, NY	Macomb, MI	Marysville, MI
Maspeth, NY	Memphis, MI	Middle Village, NY
Morgantown, WV	Mount Clemens, MI	New Baltimore, MI
New Haven, MI	New York, NY	Newport News, VA
North Ridgeville, OH	North Street, MI	Nottingham, MD
Oakland Gardens, NY	Parkville, MD	Philadelphia, PA
Pikesville, MD	Rego Park, NY	Ridgewood, NY
Riverdale, IL	Rosedale, MD	Sparrows Point, MD
Staten Island, NY	Taylor, MI	Temperance, MI
Towson, MD	Trenton, MI	Virginia Beach, VA
Wayne, MI	Westland, MI	Whitestone, NY
Whitmore Lake, MI	Woodside, NY

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