Sod that looks dull or yellow shortly after installation is usually reacting to stress rather than dying. The grass has been removed from its original environment and needs time to adjust to new soil, sunlight, and watering patterns. During this phase, growth above ground slows while roots work underneath. As long as watering is consistent and the sod stays in contact with the soil, i... https://texassodanddrainage.com/does-sod-look-dead-at-first/