Photo by Melody

PlantFiles: Rhododendron
Rhododendron 'English Roseum'

Family: Ericaceae (er-ek-AY-see-ee) (Info)
Genus: Rhododendron (roh-do-DEN-dron) (Info)
Cultivar: English Roseum

» View all varieties of Azaleas and Rhododendrons

5 members have or want this plant for trade.


6-8 ft. (1.8-2.4 m)

6-8 ft. (1.8-2.4 m)

USDA Zone 5a: to -28.8 C (-20 F)
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
Light Shade

Parts of plant are poisonous if ingested

Bloom Color:
Pale Pink
White/Near White

Bloom Time:
Mid Spring
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

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2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive claire25 On May 3, 2010, claire25 from Salisbury, MD wrote:

Have had great success with these! I took a chance growing these in full sun as foundation plantings on the south side of my house, (in drought-prone sandy soil) knowing that I'd be pushing my luck doing this. I kept them well watered the first couple years, and they have been amazingly resilient to what most people tell me are less-than-ideal growing conditions. This is their third year in this location and they are currently covered in blooms and seem very healthy even after this past very harsh winter.

Positive Shirley1md On Mar 6, 2005, Shirley1md from Ellicott City, MD (Zone 7a) wrote:

This beautiful Rhododendron grows very happily in my moisture retentive partly shady location. This hybrid is very tolerant of extreme cold, heat & humidty. It's rosy-lavender domed trusses are held above the large glossy green & recurved leaves. It is a very vigourous and upright shrub.


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

Clermont, Florida
Gary, Indiana
Shawnee Mission, Kansas
Salisbury, Maryland
Upper Marlboro, Maryland
Clarkston, Michigan
Munsonville, New Hampshire
Mahopac, New York
Charlotte, North Carolina
Bucyrus, Ohio
Allentown, Pennsylvania
Clarksville, Tennessee
Madison, Wisconsin

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