The answer to 'irrigation system yellowing' is that it is often caused by a problem with the irrigation system, such as a leak, clogged sprinkler heads, or an issue with the water pressure. Symptoms can include grass and plants turning yellow or brown, and the irrigation system not working properly. Solutions may include inspecting the system for leaks, cleaning or replacing sprinkler heads, and adjusting the water pressure. In some cases, it may be necessary to call a professional landscaper or irrigation specialist to diagnose and repair the issue.
Homeowners should first try to troubleshoot the system themselves by checking for obvious problems. However, if the issue persists or the system is more complex, it's best to call in a professional who can properly inspect and repair the irrigation system to prevent further damage to your lawn and landscaping.