We have an offer in on a house here in FL that has a seriously ratty-looking yard. The grass is of the St. Augustine variety, which is supposedly hard to kill. What would I have to do to revive and improve the lawn then? At what point do you decide to just get a landscaper in to fix the yard and put down sod? Thanks...I'm a landscaping novice, so this will be an interesting project if we do get the house.