The answer to 'why is my sod brown patches' is that there are several common causes, including drought stress, disease, pest infestations, or improper installation. Brown patches in your sod can indicate that the grass is not getting enough water, has developed a fungal disease, or is being damaged by insects or other pests.
If the brown patches are localized, it may be due to an issue like pet urine, soil compaction, or poor drainage. On the other hand, if the browning is more widespread, it could be a sign of broader environmental stress or an underlying problem with the soil or irrigation system.