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

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Cultural Details for Mahonia aquifolium

Common Name:
Mahonia; Oregon Grapeholly

Growth Rate:
Slow, 2-3' over 3-4 years.

Average Mature Height:
3-6' occasionally to 9'

Average Mature Width:

Flower Details:
Perfect bright yellow 2-3" long and wide. Terminal racemes in April

Fruit Details:
True berry, rounded, blue-black, 0.33-0.5" diameter, July-September. Looks like grape.

Fall Color:
Purplish bronze evergreen shrub

Bark Details:
Roundish, gray-brown at maturity

Disease / Insect Problems or Resistance:
Leaf rusts, leaf spots and leaf scorch, barberry aphid, scale and whitefly.

Native Habitat:
British Columbia to Oregon. Introduced 1823. Zones 5-7

Other Features:
Numerous cultivars available.

Culture and Care:
Transplant balled/burlapped or container grown in moist well drained acid soil. Prefers shade.

This plant was blooming:
4/5/2010 - 5/10/2010

Plantings of this cultivar at Boone County Arboretum:
Bed 81

    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.