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 Betula nigra 'Little King'

Common Name:
Fox Valley ('Little King') River Birch

Growth Rate:
Moderate to fast.

Average Mature Height:
10'

Average Mature Width:
12'

Flower Details:
Male catkins are drooping and brown, 2-3" long. Female catkins are smaller, insignificant, upright, and greenish. Both appear in spring on the same tree.

Fruit Details:
small nutlet, in a pendulous catkin, ripens and sheds seed in spring.

Fall Color:
yellow then soon dropping.

Bark Details:
An orangish-brown bark exfoliates at an early age to reveal a somewhat lighter shaded brownish inner bark.

Disease / Insect Problems or Resistance:
'Fox Valley' is extremely resistant to the bronze birch borer, and also has good resistance to leaf spot diseases.

Native Habitat:
Discovered and originally introduced in late 1970's

Other Features:
Exhibits dense, compact, oval-rounded growth habit with branches to the ground. Useful as a shrub mass along water courses.

Culture and Care:
Prefers moist, acidic, fertile soils. Adaptable to but also tolerates drier soils. Adapts well to heavy clay soils and will tolerate poor drainage. Avoid pruning in spring when the sap is running.

This plant was blooming:

Plantings of this cultivar at Boone County Arboretum:
2115, 3625, 3635

    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