|One of our viburnum shrubs across the back has turned brown and died.One of the branches on the adjoining shrub has one dead branch. I use whole oak leaves as a mulch under those shrubs. Could that be the problem?
|I don't think using the mulch leaves is the problem and it is difficult to know for sure without being able to look over a sample. If it was an insect, you may be able to prune out the infected areas, then the rest of the foliage should be relatively problem free. I suggest you take a sample of the plant and a photo if possible to your County Extension Office or garden center for identification, and if necessary, control recommendations. It could be that the plant was suffering from a root problem which in time will lead to dieback of part of the above ground parts of the plant. Thanks for the question. Please stop in again soon!