Tall fescue has its origins in Europe and was brought to the United States in the early 1800s. It's a deep-rooted, cool-season grass. Tall fescue performs best in well drained clay soils. Although tall fescue grass is drought tolerant, perform proper irrigation to keep it looking at its best. Without irrigation, a tall fescue lawn will thin and you will see unsightly clumps in your yard. The good news is that it is easy to water tall fescue and an attractive lawn is very obtainable.
Look for signs of the tall fescue showing stress. You will notice the leaves slightly wilting or rolling. It may take on a purplish hue.
Water your grass until 1 inch of water is put down on the lawn. A simple way to see how much water is being distributed is to set a short can or pan out in the yard. Water the grass until there is an inch of water in the can or pan. You will then have a timetable on how long to run your sprinklers each time.
Repeat your watering once a week and run the sprinklers for the length of time you figured out in step 2.