Aucuba Japonica Variegated - yellowing leaves falling off
I have a couple of rows of these in a couple of different areas that seem to be well-established. They came with the house (bought three years ago) so I have no idea how old they are. Lately, the leaves have started to yellow and fall off. I don't remember this happening before, but I honestly have only started to pay attention to the yard and gardens as of this year.
One row is in the front yard in front of the house. Very shaded. The second row is in the back yard, another shaded area. Both rows have leaves that are turning completely yellow and falling off. What can be wrong? Thanks for any suggestions!