Pseudotsuga menziesii

RHS Plant Profile

Douglas fir

RHS

Other common names

green Douglas fir, Oregon pine

Synonyms

Pseudotsuga douglasii
Tsuga menziesii
Pseudotsuga taxifolia

Conifers Trees

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A fast-growing large evergreen tree of conical habit, the bark becoming thick and rugged; leaves linear, dark green, two-ranked. Cones to 10cm long, with conspicuous exserted bracts

Position

Full sun

Soil Types

Clay, Loam, Sand

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 Sand

Moisture: Well–drained
pH: Acid or Neutral

Position

Full sun

Aspect: South–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): H6

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: Pseudotsuga are large evergreen trees with leathery, linear leaves and conspicuous cones with 3-pointed bracts emerging between the cone-scales
Name Status: Correct
Plant Range: N America, Mexico

How to Grow

Cultivation

Grow in any well-drained, non-chalky soil in full sun

Propagation

Propagate by seed sown fresh in containers in a cold frame in late winter

Suggested planting locations and garden types

Architectural
Hedging and screens

Pruning

Requires little pruning. Remove competing leaders on young trees

Pests

Douglas fir adelgids may occur

Diseases

Generally disease-free