Rhododendron keysii


Botanical Information

FamilyEricaceae
GenusRhododendron
Specieskeysii
CategoryWoody
TypeShrub (evergreen)
OriginNative to northeastern India, Bhutan, Sikkim, and southern Tibet.

Details

USDA Hardiness Zone6b - 7a
USDA Hardiness Ref.
Canadian Hardiness Zone8
Canada Hardiness Ref.
RHS Hardiness ZoneH6
RHS Hardiness Ref.
Temperature (°C)-32
Temperature (°F)-25
Height1 – 4 m
Flowering PeriodApril, May

Description and Growing Information

ShapeSprawling to mounding.
PropagationPropagate by semi-ripe cuttings in late summer, layering in autumn or grafting in late summer or late winter.
CultivationGrow best in moist, fertile, well-drained loams in full sun to part shade. Best flowering occurs in full sun.
PestsVine weevils, scale insects, honey fungus, powdery mildew, and bud blast.
Notable SpecimensCaerhays Castle, Goran, Cornwall, United Kingdom.
Bark/Stem DescriptionDark brown-grey, mild fissures can be found on older growth.
Leaf DescriptionNarrow dark green leaves that are lanceolate-elliptic or lanceolate-oblong in shape, and typically 4 –8 × 1 –3 cm in size.
Flower DescriptionNarrow tubular in shape and orange to reddish in colour with yellow or green lobes.

Photographs