Rhododendron rex subsp. rex (King Rhododendron)


Botanical Information

FamilyEricaceae
GenusRhododendron
Speciesrex
Subspeciesrex
CategoryWoody
TypeTree (evergreen)
OriginSouthwest China.

Details

USDA Hardiness Zone7b - 8a
USDA Hardiness Ref.
Canada Hardiness Ref.
RHS Hardiness ZoneH5
RHS Hardiness Ref.
Temperature (°C)-15 - (-10)
Temperature (°F)5 - 14
Height8 - 12 m
Spread4 - 8 m

Description and Growing Information

ShapeBushy.
LandscapeLow maintenance cottage and informal gardens.
PropagationSemi-ripe cuttings in late summer, layering in autumn and grafting in late summer or winter.
CultivationPrefers partial-shade. Plant in moist but well-drained slightly acidic soil.
PestsVine weevil, rhododendron leafhopper, pieris lacebug, scale insects, caterpillars and aphids may be a problem. Powdery mildews, rhododendron petal blight, rhododendron bud blast, silver leaf and honey fungus may occur.
Notable SpecimensWestonbirt, The National Arboretum, Tetbury, Gloucestershire, England.
Leaf DescriptionBroadly obovate leaves with buff indumentum beneath.
Flower DescriptionTrusses of bell-shaped flowers that appear in mid to late spring.
Colour DescriptionThe leaves are dark green. The flowers are white or pink with blotches of red at the base.
Texture DescriptionThe leaves have a glossy texture.

Photographs