Juniperus horizontalis 'Plumosa' (Andorra Juniper)


Michael's Opinion

With a unique purple colour in the winter, it is no wonder that this is one of the most popular junipers on the market. It is easily propagated and adapts to many different weather and soil conditions. The species is native to Canada and the northern United States. It seems to be highly susceptible to Phomopsis blight: this seems to be the only downfall to this beautiful, easy to care for ground cover conifer.

Botanical Information

FamilyCupressaceae
GenusJuniperus
Specieshorizontalis
Cultivar'Plumosa'
CategoryWoody
TypeShrub (evergreen)
Pronunciation

Details

USDA Hardiness Zone4 to 9
USDA Hardiness Ref.
Canadian Hardiness Zone3
Canada Hardiness Ref.
RHS Hardiness Ref.
Temperature (°C) -35 to -28
Temperature (°F)-30 - ( -20)
Height30-60 cm
Spread1.5-3 m
GrowthMedium

Description and Growing Information

General DescriptionLow growing groundcover, with long trailing branches. Branches arise at a 45° angle to ground. One of the most popular junipers where many cultivars have entered the landscape market.
ID CharacteristicPurple colour foliage in winter.
ShapeWide-spreading, dense, compact shape.
PropagationEasily propagated by cuttings.
CultivationWithstands hot, dry, sunny locations. Native to sandy and rocky soils. Found on sea cliffs, gravelly slopes, and in swamps. Salt tolerant and pH adaptable. Easily transplanted.
PestsPhomopsis tip blight can be serious.
Notable SpecimensFanshawe College, London, Ontario and the University of Western Ontario, London, Ontario, Canada.
HabitatHorticultural origin.
Bark/Stem DescriptionFairly smooth brownish gray bark.
Leaf DescriptionLeaves are awl shape and scale-like. They are a blue-grey to greenish colour but turn a beautiful purplish colour in the winter.
Flower DescriptionDioecious, inconspicious and with no ornamental value.
Colour DescriptionBlue-green to grey-green, turning a wonderful purplish colour in the winter.
Texture DescriptionMedium-fine leaf scales with tips that are sharply pointed and awl-like.

Photographs