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 Quercus phellos

Common Name:
Willow Oak

Growth Rate:
Medium, 1-2' per year Pyramidal in youth, dense oblong-oval to rounded crown at maturity

Average Mature Height:
40-60'; (90-100' in ideal situations)

Average Mature Width:
30-40'

Flower Details:
Pendulous yellow-brown catkins

Fruit Details:
Acorn, solitary or paired, thin saucer like cap

Fall Color:
Yellow, bronze-orange, yellow-brown, russet red

Bark Details:
On old trunks, lightly ridged and furrowed, gray-brown

Disease / Insect Problems or Resistance:
None serious

Native Habitat:
Bottomlands, floodplains and adjacent slopes, NY to FA, west to MO, OK, TX. Intro 1723

Other Features:
Known to withstand -25 degrees F

Culture and Care:
Transplants better than most Quercus species because of more fibrous root system, should be moved during winter. Prefers moist, well drained soil but can adapt to nearly impossible habitats. Zone 5-9.

This plant was blooming:

Plantings of this cultivar at Boone County Arboretum:
1460, 8579

    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