Rhododendron English Roseum

Prized for its tolerance to sun, cold, and humidity, Rhododendron ‘English Roseum’ is a dense and showy evergreen shrub. From late spring to early summer, ‘English Roseum’ graces the garden with its profuse, large, dome-shaped clusters of 8 to 10, trumpet-shaped, lilac rose flowers with delicate orange freckles.

Prized for its tolerance to sun, cold, and humidity, Rhododendron 'English Roseum' is a dense and showy evergreen shrub. From late spring to early summer, 'English Roseum' graces the garden with its profuse, large, dome-shaped clusters of 8 to 10, trumpet-shaped, lilac rose flowers with delicate orange freckles. They contrast beautifully with the foliage of large, smooth, glossy, medium green leaves. A very reliable performer, this pretty late midseason Rhododendron is quite tough and can withstand temperatures as low as -25ºF (-32ºC). This large ornamental shrub is perfect for background plantings or filling areas beneath deciduous trees where it will add elegance and brilliant color. 

  • Grows with a good dense habit, up to 6-8 ft. tall and wide (180-240 cm). 
  • Winner of the Rhododendron of the Year Award of the American Rhododendron Society for the South East region.
  • A sun to part shade lover, this plant is easily grown in moist, acidic, humusywell-drained soils. Plant shallowly in a location protected from strong winter winds. Protect from frost to prevent damage to flowers. Mulch annually with leaf mold to retain moisture, control weeds, and cool the soil.
  • Perfect for shrub borders or mixed borders, as a flowering hedge or privacy screen, foundation plantings, and shade gardens
  • Attracts butterflies, hummingbirds, and birds
  • Removing spent flowers promotes new growth.
  • All parts of the plant are poisonous if ingested.
  • Toxic to dogs, toxic to cats, toxic to horses.
  • Toxic to dogs, toxic to cats, toxic to horses.

Requirements

Hardiness 4
– 8

Plant Type Shrubs
Plant Family Azaleas – Rhododendrons, Rhododendrons – Azaleas
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)Summer (Early)
Height 6'
– 8'
(180cm
– 240cm)
Spread 6'
– 8'
(180cm
– 240cm)
Spacing 72″
– 96″
(180cm
– 240cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained
Characteristics Plant of Merit, Showy, Evergreen
Tolerance Rabbit
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders, Hedges and Screens
Garden Styles City and Courtyard, Informal and Cottage, Traditional Garden