Bring the Outdoors Home

Rhododendron ‘English Roseum’ | Plant Profile

Rhododendron ‘English Roseum’ is a member of Rhododendron genus which contains up to 900 members of Rhododendron and Azaleas. ‘English Roseum’ is an evergreen shrub that can grow to 10′ tall and equally as wide. These dense shrubs or bushes bloom large flowers, each with a multitude of petals. The flowers an be rose, lilac, or lavender colors. The dark green leaves remain throughout winter.

‘English Roseum’ prefers acidic, medium moisture, well drained soils in part shade. Do not let the roots dry out completely or over saturate. Spent flowers should be cut off immediately after they die back to prevent self seeding and to remove the large unattractive dead heads.

‘English Roseum’ are large dense shrubs that can be used in a variety of landscape applications. Align multiple plants to create a shrub border or hedge that is complimented by giant flowers. They are an effective option for areas with heavy shade. These large shrubs can also be left to naturalize in woodlands.


Rhododendron 'English Roseum' Characteristics

Rhododendrons are very popular shrubs in the Pittsburgh area. The large flowers and shade tolerance make them showy additions in areas where other flowering plants might struggle. Light morning sun is acceptable, but strong afternoon sun may cause scorch. These shrubs survive best when guarded from strong winds. It is important to not plant near walnut, butternuts, pecan, or hickory trees as they excrete a substance that is toxic to Rhododendron. The root system of these shrubs is shallow, so avoid landscaping at the base. Mulching at the base is advised to help to retain a consistent soil moisture.

Rhododendrons can be vulnerable to many insect or disease issues. This can often be cured by pesticides and anit-fungals. However, if planted in the correct location and cared for properly, these issues should not be life threatening. Root rot is common in overly saturated soils. Chlorosis, the yellowing of the leaves, can happen in soil with too high of a pH. Chlorosis should be immediately attended to as this can be fatal.

USDA Climate Zone
Zones 4 - 8
4.00 - 10.00'
5.00 - 11.00'
Bloom Time
April - May
Part Shade - Full Shade
Deer Resistant?