Why is My St Augustine Grass Turning Yellow? Discover the Solution.

St augustine grass turns yellow due to various reasons such as overwatering, drought, nutrient deficiency, pests and disease. Inadequate amount of sunlight can also cause yellowing of the grass.

St augustine grass is prevalent in the southern region of the us and is known for its tolerance of heat and humidity. It is a popular choice for lawns due to its lush green appearance, excellent heat tolerance, and resistance to wear and tear.

However, if the grass starts to turn yellow, it can be an indicator of an underlying problem. In this article, we will discuss the common reasons for yellowing of st augustine grass, the symptoms, and how to prevent it from happening. We will also provide tips on how to maintain a healthy and vibrant lawn.

Why is My St Augustine Grass Turning Yellow? Discover the Solution.

Credit: www.bobvila.com

Reasons For Yellowing St. Augustine Grass

St augustine grass turning yellow could be due to a variety of reasons. One cause is overwatering, which suffocates the roots – a death sentence for the grass. Conversely, not giving enough water can cause dehydration and yellowing. Nutrient deficiencies are another culprit: nitrogen and iron are crucial for growth, and an incorrect ph can also cause yellowing.

Lastly, pests and diseases can harm the grass, leading to yellowing and eventual death. Chinch bugs, webworms, brown patch, gray leaf spot, and take-all root rot are all examples. Therefore, take note of how often you water, assess the nutrient levels of your lawn and keep an eye out for pests.

By resolving these issues quickly, you give your st. augustine grass the best chance of thriving.

Identifying The Cause

St augustine grass is a popular species in warm climates, but why is it turning yellow? Identifying the cause is key to restoring your lawn’s health. First, check for fungal diseases or insect infestations. Secondly, examine the soil for acidity levels and drainage issues.

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Thirdly, assess your watering habits – you may be over or under-watering your lawn. Fourthly, consider the amount of shade during the day. Finally, ensure you are properly fertilizing your lawn throughout the year. By following these guidelines, you can identify the root cause of yellowing grass and take corrective action to restore its vibrancy and health.


If your st. augustine grass is turning yellow, there are several solutions available to bring it back to health. One common cause of yellowing is over or underwatering. If this is the case, adjust your watering habits accordingly. Another possible reason could be a lack of nutrients, which can be remedied by adding a slow-release fertilizer or iron supplement to the soil.

If pests are the issue, use pesticides to control the population. The same goes for controlling disease with fungicides, being sure to read all instructions and wear protective gear. By taking the right steps, your st. augustine grass can return to its vibrant green state in no time!

Maintaining Healthy St. Augustine Grass

Maintaining healthy st. augustine grass requires careful attention to watering, fertilizing and mowing practices. Water your grass deeply and infrequently, making sure not to overwater or underwater, as either practice can cause yellowing. Fertilize your st. augustine grass at the recommended times with the appropriate slow-release fertilizer to help it grow strong and healthy.

Be sure to mow your st. augustine grass at the recommended height for your variety, making sure not to cut it too short, as it needs sufficient blade length to produce energy through photosynthesis. Regularly check your st. augustine grass for signs of pests and diseases, and take appropriate action if identified to promote and maintain optimal health.

By following these practices, your st. augustine grass will stay green and healthy, without turning yellow.


St. augustine grass is a beautiful and popular grass type in many regions, but its yellowing can be a real cause for concern. By now, you must have understood the various reasons that lead to the yellowing of your st.

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augustine grass. Your turfgrass is telling you something with every change in color, so it’s important to pay attention to it and take the appropriate steps to keep your lawn looking green and lush. Some simple steps to follow are to keep your lawn well-fed, cut, watered, and maintained.

When yellowing appears, it’s always best to investigate the underlying cause before attempting to remedy the problem. Follow our tips and tricks to keep your st. augustine grass green and healthy, and you’re sure to have a beautiful lawn all year round.

Remember that taking care of your grass is not a one-time event, but rather a continuous process, and the rewards are well worth the effort!