Bhutan Pine, Blue Pine (Pinus wallichiana)
Majestic, elegant large tree growing to 50m. The bark is strikingly thin with a fine pattern of cracks and fissures on mature trees. Very large female cones up to 10cm wide. The tear of resin adheres to the young cones.
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Appearance
Majestic, elegant large tree growing to 50m. The bark is strikingly thin with a fine pattern of cracks and fissures on mature trees. Very large female cones up to 10cm wide. The tear of resin adheres to the young cones.
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Leaves
Evergreen, somewhat limp needles, 12-20cm long, 0.1cm wide. Arranged in groups of 5. Green above, blue-green below.
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Leaf upperside
Evergreen, somewhat limp needles, 12-20cm long, 0.1cm wide. Arranged in groups of 5. Green above, blue-green below.
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Flowers
Flowering period V-VI , red male flowers, reddish-yellow female flower. Male flowers accumulate in ears at the bases of long young shoots. Female flowers are 2cm long, cone-like.
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Fruits
Resinous, cylindrical cones, solitary or in groups of 2-3. Long-stalked, upright when young, pendent in the second year. Up to 25cm long. Wedge-shaped scales.
Application
Public areas, parks, aggressive roots, pollen (allergy)
Native regions
Himalaya
Location parameters
Light: sunny to off-sun, temperature: warm to cold, soil: slightly dry to moist, soil structure: normal, soil depth: shallow to very deep, soil quality: medium, pH value: 5.0 to 6.5
Demands
Sun; requires warmth and prefers sheltered locations, moderately frost-hardy; moderately dry to moist; does not like waterlogged soil; prefers acid to neutral, well-drained substrates, will not grow well in heavy soils rich in lime; intolerant of wind
Growth
Height of growth: 25m to 30m, spread: 8m-12m, growth habits: wide, horizontal, loose, spreading
Leaves
Evergreen, somewhat limp needles, 12-20cm long, 0.1cm wide. Arranged in groups of 5. Green above, blue-green below.
Flowers
Flowering period V-VI , red male flowers, reddish-yellow female flower. Male flowers accumulate in ears at the bases of long young shoots. Female flowers are 2cm long, cone-like.
Fruits
Resinous, cylindrical cones, solitary or in groups of 2-3. Long-stalked, upright when young, pendent in the second year. Up to 25cm long. Wedge-shaped scales.
Bark
Grey bark, brown in the furrows, smooth when young, peels off in plates with age.
Roots
Expansive, surface-rooting, moderately deep-rooting, does not like compaction of the soil