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Description of Rhododendron 'Humboldt'

R. 'Humboldt' 
Photo by: Diane Weissman

Seed Parent x Pollen Parent: 

catawbiense x unknown 

Predominant Flower Color: 

Lavender 

Flower / Truss Description: 

Flower 2" to 3" across, very pale purple with blackish-red markings. Held in ball-shaped truss with 16-20 flowers. 

Fragrant: 

No 

Bloom Time: 

Late Midseason 

Height (ft.) in 10 Yrs: 

Cold Hardiness Temperature: 

-20F  (-29C)

Foliage Description / Plant Habit: 

Leaves ovate, 4" to 6" long, dark green. Upright, well-branched plant. 

Elepidote (E) or Lepidote (L): 

Hybridizer: 

Seidel 

Registration Reference: 

RHS 58 

 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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