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Pseudotsuga menziesii

Dougie · Douglas Fir · Douglas Spruce · Douglas-fir

Family PinaceaeGenus Pseudotsuga

A tall conifer with a thick furrowed trunk and short irregular branches, standing clear of younger trees below a gray scree slope.
The whole plantWalter Siegmund (talk)CC BY-SA 3.0

About the plant

What it is and where it grows — not part of any germination protocol.

The plant

Habit
TreeExtension Gardener Plant Toolbox
Habit
treePlants of the World Online
Height
40-80 ft12-24 mExtension Gardener Plant Toolbox
Spread
12-20 ft3.7-6.1 mExtension Gardener Plant Toolbox
Flower
Gold/Yellow, Red/BurgundyExtension Gardener Plant Toolbox
Blooms
SpringExtension Gardener Plant Toolbox
Native range
Alaska, Alberta, Arizona, British Columbia, California, Colorado and elsewhereGBIF Backbone Taxonomy
Hardiness zones
4-6Extension Gardener Plant Toolbox

Growing conditions

Sun
Full sunExtension Gardener Plant Toolbox
Soil
High Organic Matter, Loam (Silt)Extension Gardener Plant Toolbox
Soil pH
Acid (<6.0), Neutral (6.0-8.0)Extension Gardener Plant Toolbox
Moisture
Good Drainage, MoistExtension Gardener Plant Toolbox
Watering
Drought tolerance: LowPLANTS Database

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Extension Gardener Plant Toolbox — NC State Extension; Plants of the World Online — Royal Botanic Gardens, Kew; GBIF Backbone Taxonomy — Global Biodiversity Information Facility; PLANTS Database — USDA NRCS.

Worth knowing

Protocol

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 4 days to germinate.

36% germination in 4 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Pseudotsuga p. 201Public domain
Show the original text
Pseudotsuga (Pinaceae). P. menziesii germ. 70D(4/11 on 4th d) and 70L(none) using seeds taken from current year cones that were just starting to turn from green to brown. Seeds DS for a y outdoors germ: 70L(4/21 in 1-3 w), 70D(1/21), 40-70(2/22), and 2/22 in March in outdoor treatment.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Pseudotsuga p. 201. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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