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More Information: Rhododendron 'Peter Koster'


R. 'Peter Koster' 
  Photo: Steve Henning

Predominant Flower Color:  Red

Flower/Truss Description:  Flower broadly funnel-shaped, 2½" across, rosy crimson, paler at edges, inconspicuously marked dark brown at base of dorsal lobe. Truss has about 16 flowers.

Fragrant:  No

Bloom Time:  Midseason to Late Midseason

Foliage Description / Plant Habit:  Leaves obovate, 3½" to 4" long, flat, deep green, with thin brown indumentum below.

Height:  5 feet in 10 years.

Cold Hardiness Temp:  -5°F  ( -21°C)

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

Glossary of plant description terminology.
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.


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