The answer to 'why is my stone walkway dead trees' is that the stone walkway is likely preventing proper drainage and water absorption, leading to the death of nearby trees. The compacted stone and soil under the walkway can block water and nutrients from reaching the tree roots, causing them to weaken and die over time.
Some common symptoms include the trees producing fewer leaves, having discolored or wilting foliage, and eventually dying back completely. To resolve this issue, you may need to remove or modify the stone walkway to improve soil aeration and water flow around the tree roots.