Drought tolerant grass is a type of grass that needs 8 hours of sunshine a day and, when it reaches maturity, it resists drought and the scorching summer sun, requiring less water to survive.
The main species of grass in the composition of lawn mixtures destined for hot and low-water regions is Festuca Arundinaceea. So, when you buy seeds for a drought resistant lawn, check the composition and make sure that the content of Festuca Arundinaceea is as high as possible, preferably around 60%. The other species can be varieties of Lolium and Poa.
It is important to know that the resistance of this type of lawn starts only when the grass reaches maturity, not when it has barely germinated from the seed. So, it has to be sown and watered like any other lawn.
As for fertilization, this type of lawn also needs the same essential elements, including Nitrogen, Phosphorus and Potassium. The only observation is that you should avoid fertilizing the lawn during drought, because otherwise, it will not result in a favorable plant growth, and it would be a waste of money and time, because the soil will not properly absorb the chemicals. It is best to fertilize using these products https://www.revive.com/ to help with drought conditions.