Rhododendron cat. 'English Roseum

English Roseum Rhododendron

English Roseum (Rhododendron ‘English Roseum’) is an evergreen rhododendron with pink flowers. Its display arrives in the later part of the rhododendron flowering season, with the exact timing influenced by local weather. The flower tubes widen into flared faces that display the color clearly. Clusters commonly carry about 8-10 blossoms. Contrasting orange markings add detail within the flower faces.

The plant develops a dense crown. The green leaves have a glossy surface that gives the foliage a distinct presence between flowering seasons. Allow space for the branches to develop without crowding nearby plants or paths.

This cultivar tolerates sun, with light shade useful in hotter positions. Provide acidic, humus-rich soil with good drainage, maintain moisture during dry weather and keep mulch away from the stems.

Size guide
• Height: About 6 ft at 10 years; growth continues afterward
• Width: Allow for the cultivar’s natural branch spread; a verified numerical spread is not available in this reference.

Hardiness
• Approximate cold tolerance: -25°F
• USDA cold-limit equivalent: Zone 4b
This equivalence is calculated from the published temperature rating. Local conditions and summer climate also affect performance.

Best Uses
• Border
• Woodland Gardens
• Accent Plant

Plant type

Broadleaf Evergreen, Evergreen Shrub, Flowering evergreen shrub

Height

6 ft+

Width

6'

Hardiness zones

4b–8

Sunlight

Full sun to part shade

Bloom time

Spring to summer

Flower color

Pink

Leaf color

Green

Fall color

Green

Attracts

Bees, Hummingbirds

Soil

Acidic, Humus rich, Moist well-drained

Landscape use

Accent Plant, Border, Woodland Gardens

Shape

Dense

Fruit

Yes

Fragrant

No

Deer resistant

Yes

Salt tolerant

No

Drought tolerant

No

10-year height

6 ft