Add Yahoo as a preferred source to see more of our stories on Google. Drought and insects have killed an unprecedented number of Oregon's Douglas fir trees during the last decade, costing billions in ...

Hidden in a Lakewood neighborhood, a tall Douglas fir stands resolute by the road, towering about 150 feet tall and 80 inches wide. Its bark is riddled with holes, and it’s between 400 and 600 years ...

A nonnative tree-killing insect is invading northern Utah, attacking subalpine fir and potentially triggering yet another die-off of the region's long-stressed conifer forests. Introduced from central ...

Federal officials are enlisting arborists and other tree experts as they scramble to develop a plan to protect one of the world’s tallest non-redwood trees from losing a significant chunk of its ...

I trimmed my boxwood shrubs at home this past weekend and the whir of my hedge trimmer lulled me into thinking about the plethora of questions I routinely receive from gardeners and homeowners about ...

Forest and fog above Hoh River, from Spruce Nature Trail; Olympic National Park, Washington. Photo: VWPics via AP Images (AP) What should be evergreen hills and forests throughout the Pacific ...

In southern Oregon they call it the "fir-mageddon." That's where we first began to notice the rapid decline of our largest and most prolific tree in the Pacific Northwest. The Douglas fir is not only ...