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 Clethra alnifolia 'Pink Spires'

Common Name:
Pink Spires Summersweet Clethra

Growth Rate:

Average Mature Height:
8', occasionally higher

Average Mature Width:

Flower Details:
Perfect, soft pink, 5-petaled, delightfully fragrant, 0.33" across, July into August. Borne on current season's growth in 2-6" long upright panicles.

Fruit Details:
Dry, 3-valved, dehiscent, pubescent capsule, 0.125" in diameter. Persists through winter.

Fall Color:
Pale yellow to rich golden brown mid-October through mid-November.

Bark Details:
Brown, pubescent, rounded or obscurely 3-sided; light brown, continuous pith.

Disease / Insect Problems or Resistance:
Tremendously pest-free, although mite damage can be seen in dry conditions.

Native Habitat:
Maine to Florida to coastal Texas.

Other Features:
Late flowers can be an asset to the summer garden.

Culture and Care:
Moist, acid soil, partial shade or full sun.

This plant was blooming:
7/9/2010 - 8/5/2010
7/28/2005 - 8/4/2005

Plantings of this cultivar at Boone County Arboretum:
Bed 87

    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.