Thuja plicata 'Whipcord' (Whipcord Arborvitae)


Michael's Opinion

Barely seen in the average landscape, long scaled foliage takes some getting use to but boasts year round interest; grafted forms appear unkempt and overgrown like a mop atop a short stalk. Grown at ground level in is an unusual accent plant, grown as a standard it is a hideous affair.

Botanical Information

FamilyCupressaceae
GenusThuja
Speciesplicata
Cultivar'Whipcord'
CategoryWoody
TypeShrub (evergreen)

Details

USDA Hardiness Zone5 - 7a
USDA Hardiness Ref.
Canadian Hardiness Zone6
Canada Hardiness Ref.
RHS Hardiness ZoneH6
RHS Hardiness Ref.
Temperature (°C)-21 - (-15)
Temperature (°F)-5 - 5
Height1 – 1.5 m
Spread1 – 1.5 m
GrowthSlow
Flowering PeriodMay

Description and Growing Information

General DescriptionSmall, mounded shrub is sparse with sprays of long thread-like scaled foliage.
ID CharacteristicLong cord-like scaled foliage, very slow growing, appears low growing and mounded with shoots cascading from the center stalk. Bronze winter colour.
ShapeMounded and mop-like with sprays of cord-like foliage which radiates upwards from the center and cascades to the ground.
LandscapeCan be used in rock gardens, garden border grafted forms may be used as a specimen plant in the landscape.
PropagationFully-ripe cuttings should be taken in December – January when the plant is dormant. Cut 7 - 12 cm from the parent plant, preferably with a “heel” still attached. Remove any leaves on the bottom third of the cutting and place in propagation bench with bottom heat treated with 8,000 ppm of IBA and mist.
CultivationPlant in full sun to partial shade on moist, well-drained soils, growth will be stunted if planted in dry place, pH adaptable.
PestsBagworms and sun scorch can be problematic. Deer resistant.
HabitatHorticultural origin.
Bark/Stem DescriptionOlder bark is dark brown-bronze and smooth; younger stems are reddish-brown overlapping, acuminate scales, each with one tiny ‘bubble’ dot.
Flower/Leaf Bud DescriptionTerminal bud is absent.
Leaf DescriptionSprays of cord-like foliage is appressed, oval-obvate scales appear two ranked.
Flower DescriptionNon-flowering.
Fruit DescriptionCultivar does not produce fruit.
Colour DescriptionSummer foliage is bright green and darkens in the winter with hints of bronze tones typical of the Thuja genus.
Texture DescriptionMedium

Photographs