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Description of Rhododendron 'Grumpy'

R. 'Grumpy' 
Photo by: Paul Wurz

Seed Parent x Pollen Parent: 

degronianum ssp yakushimanum x unnamed hybrid 

Predominant Flower Color: 

White 

Flower / Truss Description: 

Flower funnel-shaped, 2" across, cream tinged pale purplish-pink at edges and with light orange-yellow spotting. Ages to cream color. Lax trusses holds 8-11 flowers. 

Fragrant: 

No 

Bloom Time: 

Midseason 

Height (ft.) in 10 Yrs: 

Cold Hardiness Temperature: 

-5F  (-21C)

Foliage Description / Plant Habit: 

Leaves lanceolate, acute apex, round base, about 3" long, recurved, dull, dark green with orange-brown indumentum. Compact, dense, mounding habit. Very heat and sun tolerant. 

Elepidote (E) or Lepidote (L): 

Hybridizer: 

Waterer, J. 

Registration Reference: 

RHS 71 

 Note: Bloom time and 10 year height information are approximate and can vary dependent on local climate and soil conditions.
Hardiness temperature is also an approximate guideline.


American Rhododendron Society
Executive Director: P.O. Box 525,  Niagara Falls, NY 14304
Ph: 416-424-1942   Fax: 905-262-1999   E-Mail: lauragrant@arsoffice.org
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