The Douglas fir, the state tree of Oregon, can grow incredibly tall and live impressively long. The oldest Douglas fir trees have lived to be over 1,000 years old. Fox News Media ...

If your gorgeous Douglas fir is looking sickly or defoliated, there’s one pest you’d better check for, and fast! We show you ...

Douglas fir is the most abundant tree species in the Pacific Northwest. It’s Oregon’s official state tree. And it’s arguably the region’s most important timber species.

I have this 35-year-old tree in my front yard in Lake Zurich that is not doing well. Do you think the ivy is causing the demise of the tree and if I were to remove the ivy around the trunk, is ther… ...

In “Trees on the Edge,” for which Lowrey contributed aerial survey work, the acres with Douglas fir mortality attributed to the flatheaded fir borer jumps from a high of about 50,000 acres in ...

The iconic Douglas-fir has been standing tall in Oregon for many centuries. But the evergreen species isn't doing so well lately, with many trees dying off in parts of the Klamath Mountains of ...