Pinus densiflora

RHS Plant Profile
Japanese red pine

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Japanese red pine RHS
Conifers Trees
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A tall, broadly conical to rounded tree, becoming flat topped, with reddish-brown, flaky bark in the upper crown, grey and fissured near the base. Stiff, bright green needles, about 10cm long, are borne in pairs and the cones are yellow-brown, around 4cm long

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

Higher than 12 metres

Max Spread

4-8 metres

Size

Time to Maturity
20–50 years
Max Spread
4-8 metres
Max Height
Higher than 12 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Exposed or 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)
H7
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
Columnar upright
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
Japan, Korea

How to Grow

Cultivation

Grow in any well-drained soil in full sun. See Trees: buying and planting specimens

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Architectural
  • Low Maintenance

Pruning

No pruning required

Pests

May be susceptible to adelgids, aphids, pine sawfly and pine shoot moth

Diseases

May be susceptible to honey fungus and needle cast diseases