Direct Answer • Key Takeaway
Interior Douglas-Fir Reaches an Average Height of 30 to 37 M (100 to 120 Ft) with a D. B. H. Between 38 and 102 Cm (15 and 40 In) in 200 to 300 Year's. on the Best Sites, Dominant Trees May Attain a Height of 49 M (160 Ft) and a D. B. H. of 152 Cm (60 In) (23).