Richard Seidman remembers one of the very first trees he planted in Portland in 1989 for Friends of Trees, then his fledgling ...

It’s not the biggest. It’s not the oldest. But it’s rare to find a big oak in such a highly developed area. Here’s how it ...

But when you slow down to look closely, you’ll discover that all trees bloom. For most species, such as familiar maples, oaks ...

Allergy season can be miserable for tens of millions of Americans when trees, grass, and other pollens cause runny noses, ...

If you're thinking of adding a street tree out front, Penn State urban forester Vincent Cotrone has some recommendations.