Boone County Arboretum
9190 Camp Ernst Road
Union, Kentucky 41091
Phone: (859) 384-4999
Fax: (859) 384-6888

Open Daily
Dawn - Dusk
Free Admission

Join Our Email List

Contact Us

Information on invasive species

Emerald Ash Borer Information

Horticutural Links

Donate to the Boone County Arboretum

Boone County Arboretum

Promote Your Page Too

Employee Login

Cultural Details for Ilex verticillata 'Winter Red'

Common Name:
Winter Red Winterberry Holly; Black Alder; Coralberry; Michigan Holly

Growth Rate:
Slow. Medium growth with adequate fertilizer and water.

Average Mature Height:

Average Mature Width:

Flower Details:
Inconspicuous, greenish to white, FEMALE flowers early through late June, borne single or in pairs or trios on short penduncles, showing 4-7 of each flower part.

Fruit Details:
Berry-like rounded one-seeded fruit, 0.25-0.50" across, borne in dense clusters. Green during growing season, colorful in fall and winter. May persist till spring. Poisonous if eaten by humans.

Fall Color:
Little if any fall color in leaves. Of interest is the bright red fruit.

Bark Details:
Dark gray to dark brown or black on old stems, interesting twist to branches. Smooth with some lenticels.

Disease / Insect Problems or Resistance:
Tar spots, leaf spots, and powdery mildew, none serious

Native Habitat:
Native on edge of woods or in swamps from Novia Scotia to western Ontario, west to Wisconsin, south to Florida, and west to Missouri. Hardy to Zone 4.

Other Features:
The intense color of the fruit is maintained throughout winter, and is beautiful in a snowy setting. Cut stems keep for months indoors if not placed in water.

Culture and Care:
Transplant B & B or as container plant. Adaptable to wet conditions. Prefers moist, acid, high organic soil. Best pollinated by a nearby 'Southern Gentleman', and best fruit production when in sun.

This plant was blooming:

Plantings of this cultivar at Boone County Arboretum:
Bed 185

    The information on this page may have come from one or more of the following sources:
  • Dirr, Michael. Manual of Woody Landscape Plants. Stipes Publishing. 1998.
  • Hightshoe, Gary L. Native Trees, Shrubs, and Vines for Urban and Rural America. John Wiley & Sons. 1988.
  • North Carolina Extension Plant Fact Sheets.
  • University of Connecticut Plant Database.