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Encyclopaedia of trees- Choosing shrubs and trees
- Bhutan Pine, Blue Pine (Pinus wallichiana)
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.
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.
Photos
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Types of damage
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