Adequate amounts of lightly compacted, good-quality soil are essential to healthy tree growth. Nowhere are these conditions more challenging than in urban areas dominated by streets, sidewalks, ...

DeepRoot, a landscape innovator with projects all over the globe, is installing a soil structure system to grow long-living trees as part of the transformation of the newly-named David H. Koch Plaza.

Mike James sees them all the time: spindly city trees, their roots crammed into shallow holes that might as well be flower pots. It's too late for those arboreal prisoners, which sooner or later will ...