Rocky Mountain Douglas-fir Blue Douglas-fir Inland Douglas-fir Colorado Douglas-fir

Pseudotsuga menziesii var. glauca (Pinaceae) is the interior, Rocky Mountain variety of Douglas-fir. It is native from the eastern slopes of the major western mountain ranges through the Rocky Mountain states. It is smaller than the coastal form (typically to 130 feet), with glaucous (bluish-green) foliage and smaller cones.

Rocky Mountain Douglas-fir is more cold-hardy and drought-tolerant than the coastal form but slower growing and shorter-lived (typically under 400 years). It grows in full sun on well-drained soil. The blue-green foliage makes it more ornamental than the coastal form for landscape use. Hardy in Zones 4a to 8b.