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

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Cultural Details for Ilex glabra 'Nigra'

Common Name:
Inkberry Holly

Growth Rate:
Normally slow, but fast from sucker shoots.

Average Mature Height:
6-8'

Average Mature Width:
8-10'

Flower Details:
6 creamy petals, opening late spring. Male flowers borne 3+ together on a slender stalk, female flowers solitary.

Fruit Details:
Berry-like drupe, purplish red changing to black, 0.25" diamter with 5-7 pyrenes. September-May of the following year.

Fall Color:

Bark Details:
Slender, green, powdery, pubescent at first, finally glabrous.

Disease / Insect Problems or Resistance:
Seems to be quite free of problems.

Native Habitat:
Nova Scotia to Florida, west to Missouri, Mississippi, and Texas.

Other Features:
Excellent for foundation, accent plant, or hedge plantings. Spreads by underground stems, and is the only holly to sucker in this manner. Amazingly adaptable.

Culture and Care:
Prefers moist, acid soils and withstands heavy pruning. Avoid extremely high pH soils. Best in full sun with moist soil, but tolerates shade.

This plant was blooming:

Plantings of this cultivar at Boone County Arboretum:
Bed 3, Bed 184

    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. www.ces.ncsu.edu
  • University of Connecticut Plant Database. www.hort.uconn.edu