St. Augustine grass is native to the Gulf of Mexico area and the coast of the Mediterranean. It is able to thrive in a variety of soil conditions and is shade-tolerant. What St. Augustine grass cannot tolerate is drought. During dry summer months this grass type will need supplemental irrigation to stay healthy and green. Mowing height for St. Augustine grass is recommended at 3 1/2 to 4 inches, to help shade the roots and avoid dehydration.
Water St. Augustine grass sparingly during the spring.
Irrigate newly-laid St. Augustine sod immediately after installation and several times a day, lightly, for the first 7 to 10 days.
Water new sod or seed with 1/4 to 1/2 inch of water, once a day, for the next week. Begin this watering schedule once the grass' roots have established themselves.
Irrigate the grass two to three times per week, with 1/4 to 1/2 inch of water, for the following three to four weeks.
Water established lawns on an "as-needed" basis only, to promote a strong, healthy root system. The grass should receive 1 to 1 1/2 inch of water per week, including what it receives through rainfall.