Pinus wallichiana

RHS Plant Profile

Bhutan pine

RHS

Other common names

blue pine, Himalayan pine, Himalayan white pine

Synonyms

Pinus excelsa Wall. ex D. Don
Pinus griffithii McClell.

Conifers Trees

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A large broad-crowned evergreen tree retaining its spreading lower branches when grown in an open position. Long, slender, drooping blue-grey needles and banana-shaped cones up to 25cm long

Position

Full sun

Soil Types

Clay, Loam

Max Height

Higher than 12 metres

Max Spread

wider than 8 metres

Size

Time to Maturity: more than 50 years
Max Spread: wider than 8 metres
Max Height: Higher than 12 metres

Growing Conditions

Clay Loam

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H6
Drought Resistance: Yes

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Pinaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Pinus can be shrubs or large, evergreen trees, some species with attractive bark, developing an irregular outline with age and bearing long needle-like leaves in bundles of 2, 3 or 5; conspicuous cones may fall or remain on the tree for years
Name Status: Correct
Plant Range: Himalaya

How to Grow

Cultivation

Grow in well-drained soil in full sun in a position sheltered from strong winds. See Trees: buying and planting specimens

Propagation

Propagate by seed sown in containers in a cold frame in late winter. Retain in pots for two years

Suggested planting locations and garden types

Architectural
Coastal

Pruning

No pruning required. Remove competing leaders if necessary

Pests

May be susceptible to adelgids, conifer aphid, sawfly larvae, and pine shoot moth

Diseases

May be susceptible to honey fungus and needle cast diseases