Im trying to figure out what is causing this yard to die. Over the last 3 years the st augustine is slowly dying out and weeds are taking over. it started out as 2 circles, 1 about 4 feet and the other about 10. Now its half the yard. Before the homeowner didnt care but now she is wanting to fix the problem and im not sure where to start. I have fertilized the yard twice this year with Bonus s. its in the mid 90s here and when it rains the grass looks great but without water in 2 days it starts to wilt. If anyone could look at these pics and help identify the problem that would be great.