What should fine fescue look like in full sun with temps. in the 80's with high humidity? It is beyond me why they would use this grass in a full sun area when it is a shade tolerant grass. It is obvious in the shaded areas the grass is more lush. From what I know fescue does not do the best in full sun. I have a customer complaining that his sprinkler runs every other day and his lawn is baked. There are few blades of rye mixed in that are all green. I have checked for grubs, surface insects. Will the fine fescue look burned with too much water?