I have a large (40') white dogwood in my yard....it was quite large when we moved in (1990), so I imagine it is about 30 years old.....over the last few years it has slowly lost its ability to produce flowers, and this year there are very few flowers on it, but the leaves look healthy...I noticed last year late in the summer that the tree looks diseased...black spots on the leaves....is this tree dying or can it be saved?....thanks,
