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Description of Rhododendron 'Mary Guthlein'

R. 'Mary Guthlein' 
Photo by: Henk Borsje

Seed Parent x Pollen Parent: 

(Scintillation x Inamorata) x [fortunei x (wardii x dichroanthum)] 

Predominant Flower Color: 


Flower / Truss Description: 

Flower broadly funnel-shaped, wavy edges, 3" across, lightly scented, pale orange-yellow, unmarked. Flat trusses of 7-9 flowers. 


Yes slightly 

Bloom Time: 


Height (ft.) in 10 Yrs: 

Cold Hardiness Temperature: 

0F  (-18C)

Foliage Description / Plant Habit: 

Leaves elliptic to oblong, broadly acute apex, rounded base, 4" long, dull, moderate yellowish-green, retained 2 years. Shrub has upright freely branching, vigorous habit. 

Elepidote (E) or Lepidote (L): 



Registration Reference: 

ARS 974 

 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
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