36+ Why Is My St Augustine Grass Turning Brown. We live in so cal so it.as far as which grass seed to purchase, go to your local garden nursery and find out if you can seed over your existing grass. My st augustine grass has been turning brown very quickly.
Mostly goes dormant in the winter, then will start to come back in the spring.
Augustine grass, stenotaphrum secundatum st. As a plant that heavily relies on nitrogen, the grass begins to die and turn yellow when this substance becomes diluted. Augustinegrass grows best in warm, humid areas that are not exposed to. This is the normal progression and the plant will still produce fresh leaves for some time if cared for.