2 years ago a spot in my yard started to turn brown. It was in a round shape with a little green in the center. It then over a years time grew to 4 ft or larger. I removed all of it along with a couple inches of dirt. I then added 2 to 3 inches of top soil and laid new St Augustine sod. It was good for a season but has now over the winter and spring is brown with some green but betting worst.
I don't know what to do but dig it all out again. I live in Fort Worth, TX.