Cedrus libani (Cedar of Lebanon)


Michael's Opinion

Scot this tree is the national tree of Lebanon and is featured on that country's flag. A rarely seen but hardy tree in the most southern areas of Ontario. It is quite unique in the landscape for its stark, refined form. Well worth a try and valuable for the purpose of winter interest.

Botanical Information

FamilyPinaceae
GenusCedrus
Specieslibani
CategoryWoody
TypeTree (evergreen)
OriginNative to Lebanon and the mountains of Syria to South East Turkey. Cited numerous times in the Old Testament of the Bible and in mythology. It is listed as a 'vulnerable' by the International Union for the Conservation of Nature.
Pronunciation

Details

USDA Hardiness Zone6 - 7
USDA Hardiness Ref.
Canadian Hardiness Zone5a - 6b
Canada Hardiness Ref.
RHS Hardiness ZoneH6 although I have seen it survive in protected areas in H7.
RHS Hardiness Ref.
Temperature (°C)-20 to -15
Temperature (°F)-10 - 5
Height15 - 20 m
Spread15 - 20 m
GrowthSlow
Flowering PeriodJune

Description and Growing Information

General DescriptionLarge stately evergreen with a massive trunk when mature, along with wide-sweeping, horizontal branches which originate on the lower trunk. Dark green needles and cones are held upright above the foliage.
ID CharacteristicStately specimen tree. Pyramidal shape when young. Flat-topped, slightly loose, and spreading tree with strong horizontal branching when mature. This is the most cold-hardy of the Cedrus genus.
ShapeIrregular and tightly pyramidal in youth; as it ages, massive horizontal spreading of the limbs takes place.
LandscapeIt is not suited to street plantings but makes an exceptional specimen tree. It is widely used as an ornamental in southern climates and produces a very statuesque form with age.
PropagationPropagate from seed and sow as soon as it ripens. It is difficult to propagate from cuttings, and it does not like to be transplanted.
CultivationIs widely cultivated as an ornamental species in southern climates. Requires about 1000 mm of rain a year. They form open forests with a low undergrowth of grasses in their native habitat.
PestsNo pests or diseases of consequence.
Notable SpecimensNiagara Parks Botanical Gardens, Niagara Falls, Ontario. Westonbirt, The National Arboretum, Tetbury, Gloucestershire, England. Goodwood House, Chichester, England where 45 plants remain from an original 1760's planting. Some 350 young plants from wild collected origins will be planted over 30 sites in England in the next few years (2015) including Edenhall, Penrith; Old Rectory, Wantage; and Goodwood House, Chichester.
HabitatFull sun, intolerant of drought. Prefers moist, well-drained fertile soil, but will survive poor soils.
Bark/Stem DescriptionThick trunk, dark greyish-brown colour with a speckled appearance and a deeply fissured texture.
Flower/Leaf Bud DescriptionSmall, oval and brown, enveloped with few scales.
Leaf DescriptionAlternate 4-sided, stiff, tapered near the points. Dark green to grey-green 2-3.5 cm long. Tufts of 30-40, white lines on all 4 sides. Needles stay attached to the tree for 2 years, when they fall to the ground they don't decay for several years.
Flower DescriptionDoes not flower until it is 25-30 years old. The flowers or catkins are unisexual, with both male and female flowers on the same tree. The 5cm catkins are reddish in colour.
Fruit DescriptionCones erect with a flat or curved tip, 8-10 cm long, 4-6 cm wide and resinous. Young cones are light green in colour, while female cones are barrel-shaped and dull brown, maturing in their second year.
Colour DescriptionDark to bright green and often lustrous.
Texture DescriptionMedium with a broad horizontally layered appearance to the branching.

Photographs