A new study finds the West is likely to see slower-growing Douglas fir trees in the future, as temperatures and droughts increase with climate change. Researchers with the University of ...

Drought and insects have killed an unprecedented number of Oregon’s Douglas fir trees during the last decade, costing billions in timber value, damaging infrastructure and ramping up wildfire danger.

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 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 ...

Smaller gardens and yards need smaller trees. These evergreen trees, both conifers and broadleaf, won't grow too tall. Learn more about medium-sized evergreen trees.

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, ...

As you looked out the windows of your house this winter at all the dormant and barren deciduous trees in your landscape, perhaps you thought that a little green would be a nice addition this year. But ...

German researchers are studying using an overhead solar PV system, designed to be removable and reusable, as a sunshade for young fir trees. The pilot, located at a quartz sand excavation site, will ...

Fir trees in Oregon and Washington died in record-breaking numbers in 2022, according to as-yet unpublished research conducted by the U.S. Forest Service.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

Phytophthora root rot is a stubborn enemy for some Christmas tree growers No fungicide has proved effective to control Phytophthora Growers turning to species from Europe%2C Asia that are more ...

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 ...