If a saint augustine lawn has developed circular patches of dead, brown areas of turf, then the most likely cause for these brown patches will be a lawn fungus disease called brown patch.
22+ Brown St Augustine Grass. Augustine grass can be treated easily even using diy methods as i've described in. Brown patch, take all root rot, and grey leaf spot are all problems of st augustine grass in wet, humid, summer weather.
When How To Plant Grow St Augustine Grass Scotts from www.scotts.com
It appears that the grass is suffering (or recovering) from a rot associated with too much watering. For this reason, seed is not produced for lawn propagation use and it is therefore st. Set the mowing height at 2 1/2 to 3 inches (3 to 3 1/2 inches in shady lawns).
The appearance of brown spots may be a result of a watering problem.
Augustinegrass turns brown in winter and doesn't need to be watered when it's not growing. It has since been observed to be the most drought tolerant st. Augustine is common in hawaii, california, texas, and florida st. Since it does well in shade, it.