In the woods near Libby grows a quaking aspen 5 feet across. It is the biggest in the United States, and Milarch has cloned it. He also cloned what is believed to be the nation's largest narrow leaf ...

A fast-track method of breeding disease-resistant ash trees has been developed by researchers leading efforts to conserve the species. Researchers at the John Innes Center, who have adapted the embryo ...

Winter isn’t the ideal season for pruning trees in Upstate New York, but it’s the best time to cut scion or twigs from ash trees in parts of the state where the species has been all but wiped out.