R. 'Washington State Centennial'

Deciduous Azalea Hybrid

Synonyms R. 'Centennial'
R. 'Washington Centennial'
Hybridized By Mossman, F. D.
Seed Parent R. 'occidentale x cumberlandense'
Pollen Parent R. 'Santiam'
Introduced 1989
10 Year Height 150 cm. (5ft.)
Bloom Time midseason
Flower tubular funnel-shaped
Flower Color ?
Fragrance ?
Leaves elliptic to obovate
Leaf persistence ?
Minimum Hardiness ?
Registration Unknown or not recorded
Title
R. 'Washington State Centennial'
Photo By
Thatrhodylady
Date Taken
May 23, 2026
Location
Rhododendron Species Botanical Garden
License
CC BY 4.0
Attribution
Sizes
Description
R. 'Washington State Centennial' flower and orange flower buds opening.
Title
R. 'Washington State Centennial'
Photo By
Thatrhodylady
Date Taken
May 23, 2026
Location
Rhododendron Species Botanical Garden
License
CC BY 4.0
Attribution
Sizes
Description
R. 'Washington State Centennial' several flower trusses.
Title
R. 'Washington State Centennial'
Photo By
Thatrhodylady
Date Taken
May 23, 2026
Location
Rhododendron Species Botanical Garden
License
CC BY 4.0
Attribution
Sizes
Description
R. 'Washington State Centennial' closeup of the ovary and dorsal petal.
Title
Washington State Centennial
Photo By
Rinus Manders
Date Taken
May 8, 2014
Location
Private garden, Herpen, Netherlands
License
Copyright, Rinus Manders.
Sizes
Title
Washington State Centennial
Photo By
Don S. Wallace
Date Taken
Location
Singing Tree Gardens
License
Copyright, Don S. Wallace.
Sizes
Title
Washington State Centennial
Photo By
Rinus Manders
Date Taken
April 30, 2014
Location
Private garden, Herpen, Netherlands
License
Copyright, Rinus Manders.
Sizes