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Description of Rhododendron 'Humbolt Sunrise'

R. 'Humbolt Sunrise' 
Photo by: Don Wallace

Seed Parent x Pollen Parent: 

Else Frye x johnstoneanum 

Predominant Flower Color: 


Flower / Truss Description: 

Flower openly funnel-shaped, wavy lobes, 3" across, fragrant, pale yellow with vivid yellow blotch in dorsal throat, reverse blushed deep pink on distal half of lobes. Flat-shaped trusses hold 5-6 flowers. 



Bloom Time: 

Early Midseason 

Height (ft.) in 10 Yrs: 

Cold Hardiness Temperature: 

15F  (-9C)

Foliage Description / Plant Habit: 

Leaves elliptic to lanceolate, acute with apiculus apex, cuneate base, curve towards tip, glossy, yellow green, retained for 2 years. Upright, broad growth habit. 

Elepidote (E) or Lepidote (L): 



Registration Reference: 

ARS 791 

 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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