I have two well established dogwoods in my yard that look really ugly
this year. More than half of the buds on the trees did open, and
those that did are missing 1-3 of their petals.

Looking around the neighborhood I see that nearly all the dogwoods
look that way. Except one, it is fine on the north half and looks
like mine on the south side.

Zone 6, South Central PA
Jim