Rocky Mountain Douglas Fir (Pseudotsuga menziesii var. glauca)
Ideal Location:

Soil type preference: Requires well-drained soils. Intolerant of clay.
pH preference: Prefers somewhat acidic soils. Tolerates alkaline soils. Ideal pH range: 5.9-7.2.
Moisture preference: Prefers moist or wet soil. Intolerant of dry sites and drought.
Light preference: Full sun.
Salt tolerance: Intolerant of salt spray and soil salt.
Other:
Pest susceptibility and tolerance: No serious pest problems.
Notable foliage and flower characteristics: Interesting cones and blue-green foliage.
Height and spread: On average, grows 40 to 80 feet tall and 12 to 20 feet wide. Can get much bigger in natural areas.
Form: Conical/pyramidal. May become more irregular and flat-topped as it ages. Not recommended as a street tree.
Native status and zone: Zones 4-6. Native.
Other information: Despite the common names, it is not a true fir nor a pine.
There are two main varieties of Douglas Fir. Coastal Douglas Fir also do well in Wyoming; they get much larger and may have different coloration.

Example photograph:
A picture of a mature Douglas Fir. The canopy is pyramidal, with rounded, bluging sides. The branches form large, somewhat irregular bushy clumps. The needles are short, and there are more on the tops of branches than on the bottoms. Branches angle outward and then upward. The trunk is about a fourth as tall as the canopy. It has rough gray-brown bark.
Source: Maya Gilmore. Taken at Sheridan County Courthouse, 2019.

City of Sheridan

Large Conifers