Douglas Fir:

 

 

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  • Conifer, evergreen tree, 80-200 ft (24-61 m), crown of young trees conical, dense, become broad flat top with age.  Lower branches drooping, upper ones ascending.  Buds oval-conical, apex pointed.  Needles flattened, radially arranged, 18-30 mm long, 2 stomatal bands beneath.  Cones pendant, woody or semi-woody, 10 cm long, with distinctive 3-pronged bracts ("the two back feet and tail of a mouse"), light brown, mature in one season.

 

  • Sun. Prefers neutral or slightly acid, well-drained, moist soils.

 

  • Hardy to USDA Zone 5-6   (Pacific Coast type, P. menziesii var. menziesii) or Zone 4 (Rocky Mountain type, P. menziesii var. glauca)     

 

  • Native range from Central British Columbia south along Pacific Coast to central California, central Mexico, also Rocky Mountains to Arizona, Texas.  Most important timber species in US.
  • The largest of the Pacific Coast type is in Coos County, Oregon, 36 ft (11 m) in circumference and 329 ft (100 m) high!

 

 

 

 

Common problems with Douglas Fir trees:

 

 

Insects:

 

       
 

 
 

 

 
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Diseases:

 

     
   

 

 

    
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