The answer to 'why is my grass turning brown' is that there are several common causes, including drought, disease, pests, or improper mowing and watering. Brown or discolored grass is often a sign of stress, which can be caused by a lack of water, nutrients, or sunlight, or by pest infestations or disease.
If your grass is turning brown, the first step is to identify the underlying cause. Check the soil moisture - if it's dry, the grass may need more water. Look for signs of disease or pests, such as fungal growth or insect damage. Also consider whether you've been mowing too short or at the wrong time of day. Once you pinpoint the issue, you can take the appropriate steps to revive your lawn, such as adjusting your watering schedule, applying fertilizer, or treating for pests or disease. If the problem persists or you're unsure of the cause, it's best to consult a professional landscaper who can diagnose and treat the issue.