I would greatly appreciate any assistance with this problem. We have a lovely 5 year old yew hedge that runs the length of our driveway (approximately 30 feet). Unfortunately, it was planted with fabric and a ground covering of river rock which I now have been told is not a good environment for the hedge (although it has done well for the past five years). In August the driveway was re-done and the 1st plant went brown at the bottom. We suspected it was burned by exhaust from the back hoe but now the browning of the hedge is travelling along the whole hedge. The roots are still healthy. Any guidance would be greatly appreciated as it really is a lovely hedge and so disappointing to see it turn brown. Thank you very much.