I have searched and not yet found any good info on how the Quick 36 will perform on st. augustine. I have read only good reviews, but this type of grass in a entirely different animal. It will wear you out just walking on it. I'm also concerned about the max height setting at 4 in. During the summer months I will normally cut at the 4.5-5 in setting with my Hustler Z's. Any feedback from anybody actually using this mower on st. augustine would be greatly appreciated.