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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Dawn - Dusk
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Cultural Details for Acer x freemanii 'Armstrong'

Common Name:
Armstrong Freeman Maple

Growth Rate:
Medium to fast 12-15' in 5-7 years

Average Mature Height:
50-70'

Average Mature Width:
15'

Flower Details:
Red petals, appearing in mid to late March into April, stigmas, styles and petals are all ornamental

Fruit Details:
Samara with wings 0.75" long, usually but not always reddish maturing into brown May-June, borne on pedicels 2-3" long and held at a 60-degree angle.

Fall Color:
Variable yellow orange to orange red, often poor quality

Bark Details:
Beautiful silver-gray

Disease / Insect Problems or Resistance:
Leafhoppers may cause considerable damage, also may have problems with some borers

Native Habitat:
Horticultural origin

Other Features:
Attractive silver-grey bark, leaves have a silvery underside which is also ornamental

Culture and Care:
Tolerant of a variety of soils but prefers moist, slightly acid conditions, shows chlorosis in high pH soil, tolerant of ozone and sulfur dioxide, not particularly tolerant of urban conditions

This plant was blooming:
4/8/2005 - 4/15/2005

Plantings of this cultivar at Boone County Arboretum:
1440, 2780, 2790

    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