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 small 648 x 1152, 65 KB medium 1350 x 2400, 301 KB Full 2296 x 4080, 3.1 MB 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 small 648 x 1152, 79 KB medium 1350 x 2400, 359 KB Full 2296 x 4080, 3.2 MB 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 small 648 x 1152, 53 KB medium 1350 x 2400, 231 KB Full 2296 x 4080, 2.9 MB 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 small medium
Title Washington State Centennial Photo By Don S. Wallace Date Taken Location Singing Tree Gardens License Copyright, Don S. Wallace. Sizes small medium
Title Washington State Centennial Photo By Rinus Manders Date Taken April 30, 2014 Location Private garden, Herpen, Netherlands License Copyright, Rinus Manders. Sizes small medium