Microbiota decussata (Russian Arborvitae)


Michael's Opinion

Microbiota decussata has brown and purple, arching foliage weeping outwards. This specimen is extremely hardy and can be grown in large masses. Its unique form, texture and winter colour make it one of the best coniferous ground covers.

Botanical Information

FamilyCupressaceae
GenusMicrobiota
Speciesdecussata
CategoryWoody
TypeShrub (evergreen)
OriginDiscovered in 1921 growing above the tree line in the mountains in Southeastern Siberia. It was named and introduced in 1923 by Vladimir Leontjevich Komarov who became the director of the Komarov Botanical Institute, USSR.
Pronunciation

Details

USDA Hardiness Zone7b - 8a
USDA Hardiness Ref.
Canadian Hardiness Zone7
Canada Hardiness Ref.
RHS Hardiness ZoneH5
RHS Hardiness Ref.
Temperature (°C)-15 - (-9)
Temperature (°F)5 - 15
Height20 cm
Spread2 - 4 m
GrowthFast

Description and Growing Information

General DescriptionMicrobiota decussata is a wide-spreading woody evergreen shrub with gracefully nodding shoot tips. It is very similar in appearance to a juniper but with a softer texture.
ID CharacteristicProstrate with a distinctive rusty-brown colour in winter, fern-like the rest of the year.
LandscapeMakes en excellent ground cover, best used in masses and groupings to realize the full effect of its soft foliage, an excellent substitute for junipers.
PropagationBy cuttings rooted from August through January collected with at least 2.5 cm of the previous season's wood. It has been found that .8% IBA talc or .25% IBA in alcohol increases the rooting percentage and consistency of the crop.
CultivationGrow in part shade, in moist, well-drained soil. Light pruning will keep it in bounds however it will not tolerate heavy pruning.
PestsNo serious pests or diseases of note.
Notable SpecimensThe Gardens of Fanshawe College, London, Ontario, Canada.
HabitatRussia, growing above the tree line in the mountains of Southeastern Siberia.
Bark/Stem DescriptionSlender stems are brown.
Leaf DescriptionNeedles are scale-like, overlapping like shingles on a roof, shoot tips droop.
Flower DescriptionMonoecious, with the flower of no ornamental value.
Fruit DescriptionMale produces inconspicuous cones.
Colour DescriptionSummer foliage is bright green turning a consistent brownish-purple colour in winter.
Texture DescriptionFoliage is scale-like, feathery and relatively soft to the touch.

Photographs