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More Information: Rhododendron 'Hugh Koster'


R. 'Hugh Koster' 
  Photo: Odo Tschetsch
Deutsche Genbank Rhododendron

Predominant Flower Color:  Red

Flower/Truss Description:  Flower funnel-shaped, about 3" across, glowing crimson scarlet, with black spots on dorsal lobe. Ball-shaped truss has up to 16 flowers.

Fragrant:  No

Bloom Time:  Midseason to Late Midseason

Foliage Description / Plant Habit:  Leaves about 4" long, concave, wavy edged, glossy, dark green. Plant has stiff, upright branches. Prefers some shade to avoid leaf burn.

Height:  5 feet in 10 years.

Cold Hardiness Temp:  5F  ( -15C)

Parentage  (Seed Parent x Pollen Parent): 
     George Hardy x Doncaster hybrid

Elepidote (E) or Lepidote (L):  E

Hybridized or Selected by:  Koster & Sons

Registration Reference:  RHS 58

Note: Bloom time and 10 year height information are approximate and can vary dependent on weather and growing conditions.
Cold hardiness temperature is also an approximate value.


American Rhododendron Society
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