Fir and spruce needles are attached to twigs one by one, while pines grow needles in bunches. Fir tree needles are soft and flat, while spruce needles are stiff and angular. Check out the best types ...

Planting evergreen trees as privacy screens often looks friendlier than a fence, is cheaper than a wall, and prettier than lattice. It may take longer to reach a size to fully do the job, but it will ...

CORVALLIS, Ore. (KTVZ) – Increases in mortality among Douglas firs in the Klamath Mountains are the result of multiple factors that have the iconic tree in a “decline spiral” in parts of the region, a ...

The rapid decline of our largest and most prolific tree in the Pacific Northwest andmost important tree species to the ...

Scientists examined how growth rates in the trees changed over 91-year period. As warm, dry conditions continue in the future, fewer Douglas firs expected to grow Growth slowed across species’ range, ...

Landscape and forest trees are experiencing widespread dieback this spring according to Glenn Ahrens, Oregon State University Extension Forester for Marion County. "Browning or dieback is usually ...

A very tiny creature is causing a great deal of damage to some of Maine's spruce and fir trees. We visited a UMaine lab where ...

In 2008, scientist Bryan Black took core samples the diameter of a pencil from a forest near the north Oregon coast. Most of the trees were hemlocks and Douglas fir that had been undisturbed for about ...

HOUGHTON LAKE, Mich. – An invasive insect that kills fir trees has been found in Roscommon County, marking the fifth Michigan ...

The so-called “European” strain of sudden oak death showed up in southwest Oregon a few years back. It was known to spread to fir trees in Europe, but that hadn’t been seen in the state. Related: A ...

Fir trees in Oregon and Washington died in record-breaking numbers in 2022, according to as-yet unpublished research conducted by the U.S. Forest Service. Called “Firmageddon” by researchers, the ...