Moultrie - Dogwoods don't like too much direct sun-light, they need the shade of taller trees. Too much rainfall, has lead to diseases on the leaves, causing spotting and leaves to shrivel, and some trees are simply dying, and will have to be dug up.
Colquitt County Extension Agent, Glenn Beard says, "One of the reasons that we're finding that they are dying is because a lot of the excessive moisture that we've been having. Dogwoods are relatively shallow rooted, the just really don't like wet feet."
Diseased dogwoods are difficult to treat, so you may want to try some alternatives if you are having problems. River birch, live oaks, and maple trees all grow well in South Georgia.