St Augustine grass grows most vigorously in full sun. It needs 5 to 7 hours of direct sunlight to be healthy. Water is very important for healthy St Augustine. Watering for longer periods of time, (without run off) and less frequently. Fertilize 3 to 4 times a year.
How to grow St Augustine under my tree?
If you have large trees, in your landscape and grass is dying around the trunk, DO NOT plant St. Augustine, it will not survive. Use some sort of ground cover instead. St Augustine needs 5 to 7 hours of direct sunlight. It will not survive in heavily shaded areas. Stop wasting your money and energy. Find a landscape material that works well in full shade.
How often should I fertilize my St Augustine?
The best thing you can do for St Augustine is mow it tall, at least 4 inches. We fertilize 4 times a year. Every 8 weeks, from middle of March thru September, with a 50% slow release nitrogen.