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Deciduous Azalea
Rhododendron 'Admiral Semmes'

Family: Ericaceae (er-ek-AY-see-ee) (Info)
Genus: Rhododendron (roh-do-DEN-dron) (Info)
Cultivar: Admiral Semmes
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4-6 ft. (1.2-1.8 m)


4-6 ft. (1.2-1.8 m)


USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Sun to Partial Shade


Parts of plant are poisonous if ingested

Bloom Color:

Gold (Yellow-Orange)

Bloom Time:

Late Spring/Early Summer



Other details:

Average Water Needs; Water regularly; do not overwater

Patent Information:


Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


This plant has been said to grow in the following regions:

Mobile, Alabama

Deltona, Florida

Raleigh, North Carolina

Springfield, Virginia

Gardeners' Notes:


On Sep 10, 2014, Fires_in_motion from Vacherie, LA (Zone 9a) wrote:

I was given one in late 2011 by the Crosby Arboretum in Mississippi. (I've never seen them anywhere else.) Despite its constant fungal leaf problems, I always persisted in keeping it. I live in SE Louisiana, which is the perfect habitat for this plant, and I kept mine in dappled shade (of a live oak), as they like / require. Despite spraying it with copper octanoate several times a year, the leaf spotting just kept coming back and ravaging the plant. If you've ever tried to keep a fig tree around here, you'll know what I'm talking about when I say the leaves looked just plain BAD, meaning yellow, orange & brown amidst the green. Some nursery people to whom I've spoken agreed with me that this is just not a very good variety. Yesterday I decided to throw the plant away rather than pu... read more


On Nov 22, 2013, akt from Springfield, VA wrote:

The Admiral Semmes deciduous azalea is a cross between the Florida Pinkxster Azalea R. austrinum and an Exbury hybrid named Hotspur Yellow. It is fragrant with nice almost yellow trusses.