ARS Logo


Description of Rhododendron macrophyllum

R. macrophyllum 
Photo by: Hank Helm

Predominant Flower Color: 

Pink, Purple 

 Flower / Truss Description: 

Broadly campanulate, pink to rosy purple, occasionally white, spotted yellow. Truss holds 10-20 flowers. 



Bloom Time: 

Midseason to Late Midseason 

Height (ft.) in 10 Yrs: 

Cold Hardiness Temperature: 

-5F (-21C)

Foliage Description: 

Leaves oblong-obovate to elliptic, up to 9" long, glabrous when mature. 

Elepidote (E) or Lepidote (L): 


Plant Habit: 

Erect, vigorous shrub or small tree 

Sub Genus: 




Sub Section: 


Geographical Origin: 

W N America (California to British Columbia) 

 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:
1998-2015, ARS, All rights reserved.