An invasive sapsucking insect is endangering one of America’s most beloved Christmas trees. To help conserve it, the Missouri Botanical Garden is collecting data on how best to grow it. An invasive ...

Amid a years-long drought and insect infestation, Douglas fir have entered what scientists are calling a “decline spiral” in southwest Oregon. A study by Oregon State University faculty published in ...

White fir trees are part of the pine family, with a tall pyramidal form that brings a regal mountain magnificence to residential landscapes. This hardy evergreen conifer is lauded for its soft ...

As a tiny seedling began sprouting in the forest along Mount Rose Highway west of Reno, the Vietnam War was ending under President Gerald Ford, the price of gas was 53 cents per gallon and the ...

'Tis the season for Tannenbaum. It’s just a matter of which one. The choices can seem overwhelming at first: Will a blue spruce fill the house with the sharp scent of balsam better than a white pine?