Can someone comment on the natural lifecycle "look" of the leaves on an aucuba japonica? I have a very mature plant, about 12 feet high. As you can see from the pictures, there is a yellowing and browning of some of the leaves at this time (just after it has "bloomed"), while many others remain quite healthy looking. However, I am not sure how healthy they actually are. Is yellowing and browning and some drop-off of leaves quite natural or does this mean that it is lacking in some nutrients? Any ideas? Please see the pictures attached. I look forward to reading your comments.