I've got Bermuda grass growing, and it's starting to die out where I've got trees growing, and full shade ... Now I've got a muddy mess in a couple of places in my yard. I'm contemplating what to do with those areas.
I used to throw out Rye seed for winter grass, but now I've got a yard service that sprays twice in the winter for crabbgrass, and I feel that will kill any Rye seeds that try to germinate ...
Pablo's version is good, too . . .