Details of...
Scientific Name: Pseudotsuga menziesii
Pronunciation: soo-doe-TSOO-guh MEN-zeez-ee-eye
Common Name: Douglas fir
Family Name: Pinaceae
Plant Type: Conifer
Key ID Features: Leaves soft, needle-like, much shorter and flatter than pine trees; cones pendulous with 3-pointed bracts tucked under cone scales, look like tail and back legs of a mouse hiding under scale; bark very thick, deeply fissured. Seedling ID: 5-9 cotyledons, 1.2-2 cm long, no teeth.
Course(s): AARB 1012, HORT 1155, Level 2 Apprenticeship

Habit: Horizontal, Upright
Form: Pyramidal - widely
Texture: Medium
Mature Size:
Height:> 30m
Spread:10 - 15m
Growth Rate:Moderate
Origin: B.C. east of Cascades, B.C. west of Cascades, U.S. - northwest, U.S. - southwest
Hardiness Rating: Zone 5: (-29 to -23 C)
Exposure: Full sun
Soil/ Growing Medium: Acidic, Well-drained
Water Use: Moderate
Landscape Uses: Forestry, Native planting, Specimen plant, Wind break, Woodland margin
Additional Info: Google
Douglas fir
Leaf Morphology: Glossary
Form: Needle-like
Arrangement: Alternate, Spiraled
Texture/ Venation: Soft flexible
Surfaces: Glabrous
Colour in Fall: Green
Leaf(let) Terms:
Shapes: Acicular
Apices: Acute, Rounded
Bases: Cuneate
Margins: Entire
Additional Info: 2-3 cm long, sharp point; soft, flexible, appear in 2 rows, spirally arranged, flat, groove above.

Inflorescence Type: n/a (male cone)
Flower Morphology:Monoecious plant
Colour (petals): Male Cone, Yellow, Brown
Flower Time at Peak: Apr, May

Fruit Type: Cone (winged seeds)
Fruit Colour: Brown
Fruiting Time: Sep, Oct

Bark Morphology: Deeply fissured, Corky, Single stem trunk
Bark or Stem Colour: Grey, Brown
Organ Modifications: Ectomycorrhizae

Propagation: Seed
Plant Care:
Pest Susceptibility: Aphids or adelgids, Blight or needle cast, Canker or sap rot, Caterpillar or cutworm, Dieback, Diptera - true flies, Nematodes, Rust, Scale insects, ( Drought resistant )
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