Juniperus chinensis 'Blaauw' (Blaauw Juniper)


Michael's Opinion

A very unique evergreen with a dense upright, pyramidal growing habit. The plant features soft bluish-green foliage with unique arching branches. Makes a great focal point in any garden but often used as a screening or hedge as well.

Botanical Information

FamilyCupressaceae
GenusJuniperus
Specieschinensis
Cultivar'Blaauw'
CategoryWoody
TypeShrub (evergreen)
ReferencesMichael A. Dirr. Manual of Woody Landscape Plants. Champaign, Illinois: Stipes Publishing L.L.C, 1975.
OriginBlaauw and Company, Boskoop, Holland.
Pronunciation

Details

USDA Hardiness Zone5b - 7a
USDA Hardiness Ref.
Canadian Hardiness Zone6
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-21 - (-15)
Temperature (°F)-5 - 5
Height1.2 - 2.5 m
Spread0.6 - 2 m
GrowthMedium
Flowering PeriodMarch

Description and Growing Information

General DescriptionJuniperus chinensis 'Blaauw' is a woody evergreen shrub with blue-green foliage and small, berry-like fruit on female plants that ripens from a whitish-blue to dark brown.
ID CharacteristicErect with pronounced ascending branches forming stacked "V" shapes. Deep blue-green foliage, rough but not prickly to the touch, scale-like when the plant gets older.
ShapeErect overall with ascending, "V" shaped branches.
LandscapeThis juniper has a unique shape that makes it a pleasant corner plant or background planting. Provides contrast in combination with other broad-leaved evergreens.
PropagationBy softwood cuttings taken from new growth in spring or early summer. May also be propagated from late winter cuttings roughly 5 - 10 cm long, taken from new growth. Plant cuttings 2 cm deep in small pots, light should be allowed to reach the surface of the rooting medium to discourage the growth of harmful organisms; water only as needed.
CultivationGrow in full sun, adapts to any well-drained soil and has drought tolerance. Prune minimally for uniformity of shape.
PestsUncommon problems include: bagworm and twig blight.
Notable SpecimensNiagara Parks Botanical Gardens, Niagara Falls, Ontario, Canada. The University of British Columbia Botanical Garden, Vancouver, British Columbia, Canada.
HabitatHorticultural origin.
Bark/Stem DescriptionRough, flaky, brown, not particularly notable.
Flower/Leaf Bud DescriptionObovate, green, 0.5 - 1.5 cm.
Leaf DescriptionAwl-like on new branch growth becoming scale-like on more mature growth, 50 - 100 mm long.
Flower DescriptionOccasionally a specimen will have both male and female flowers.
Fruit DescriptionBerries are oval-shaped, powder blue, 2 cm long, produced from late spring to to late winter with no ornamental value.
Colour DescriptionBlue-green foliage.
Texture DescriptionThe foliage has a fine and delicate texture; the bark is rough.

Photographs