I have a large holly shrub, which is quickly dying. Large portions of it have turned brown. It is near a tree, Japanese maple I think, that has a fungus on a large portion of it. I don't know if the 2 are related. What should I do with the holly shrub and the tree fungus?
Yes, it could be related. A fungus that is attacking the tree may spread to attack the holly. Treat both plants with a fungicide.
That being said, they could also be unrelated. If the fungicide does not clear it up, check the roots of the holly for damage.