ARS Logo


Description of Rhododendron johnstoneanum

R. johnstoneanum 
Photo by: Hans Eiberg

Predominant Flower Color: 

White, Yellow 

 Flower / Truss Description: 

Funnel-campanulate, sometimes fragrant, white, cream or pale greenish-yellow, often blotched yellow or flushed pink. Truss holds 2-5 flowers. 



Bloom Time: 

Early Midseason 

Height (ft.) in 10 Yrs: 

Cold Hardiness Temperature: 

10F (-12C)

Foliage Description: 

Leaves broadly elliptic to elliptic, up to 4" long, margins usually bristly 

Elepidote (E) or Lepidote (L): 


Plant Habit: 

Shrub, broader than high with age 

Sub Genus: 




Sub Section: 


Geographical Origin: 

India (Manipur, Mizoram) 

 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.