Boone County Arboretum
9190 Camp Ernst Road
Union, Kentucky 41091
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Cultural Details for Magnolia sieboldii

Common Name:
Oyama (Siebold's) Magnolia

Growth Rate:

Average Mature Height:
15' to 25’

Average Mature Width:
15' to 25’

Flower Details:
Downward facing white, cup shaped flowers in early summer; pinkish to rose crimson center; fragrant; 1 to 3" carmine fruit with scarlet seeds;begins flowering at early age.

Fruit Details:
The carmine colored fruit is about 2" long and houses scarlet seeds.

Fall Color:
Golden yellow

Bark Details:
Smooth and light gray

Disease / Insect Problems or Resistance:

Native Habitat:
Native to eastern Asia, primarily to Japan, Korea and eastern China.

Other Features:
"Oyama" refers to an area on the southern Japanese island of Okinawa.

Culture and Care:
Partial shade; moist, well drained soil; more wind tolerant than most deciduous magnolias

This plant was blooming:

Plantings of this cultivar at Boone County Arboretum:

    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.