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Why is My St Augustine Grass Turning Light Green? (2022)

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St. Augustine grass is a favorite of cozy weather homeowners almost everywhere! It grows gloriously eco-friendly in also the most popular weather condition. Nonetheless, also St. Augustine grass can in some cases look much less than healthy.

What creates St. Augustine grass to turn light environment-friendly? What is the remedy? Let’s determine exactly how to get your yard looking healthy and balanced again!

About St. Augustine grass

St. Augustine grass is prominent in Florida and the gulf area. It grows well in warm, humid atmospheres. Since St. Augustine grass is salt forgiving, it does well near the sea, too. This durable grass doesn’t require much water and also becomes a dense floor covering with blue-ish green blades.

What makes St. Augustine grass turn light green?

Just because St. Augustine grass is tough as well as hardy does not suggest that it will certainly never have any problems! If you have actually noticed light green blades or patches in your yard, maybe because of one of the adhering to factors.

Take All Root Rot

The virus for Take All Root Rot is constantly existing in the origins of the grass, no matter exactly how healthy it is! Launch of the virus happens when the grass and bordering ground get as well damp or the grass is worried about some factor.

The initial indicator of Take All Root Rot patches of yellow or light green grass At some point, the roots transform white with black spots. Then, the grass will thin as the illness spreads.


Assist reduce the anxiety on your St. Augustine grass by just trimming one-third or less of the total grass blade height each time you mow. A fertilizer with equivalent parts of nitrogen as well as potassium may additionally aid your grass restore its wellness.

You might try a fungicide, but they are typically a lot more reliable when the condition is still in the origins of the plant. If you have actually had issues with Take All Root Rot in the past, you might desire to think about a fungicide, such as Scott’s DiseaseEx , to avoid future fungal outbreaks.


Pesky nematodes can attack the grass at the roots. This brings about thin, light grass If you suspect nematodes are the perpetrator for your light eco-friendly grass, take a soil example to your neighborhood expansion office to be evaluated.


Sadly, there is not a one-size-fits-all chemical treatment for nematodes. Your best protection versus these parasites is to make sure that your grass and also dirt are as healthy as feasible. Keep grass blades a minimum of 3-4 inches tall. Make sure your diet has adequate potassium levels to sustain healthy and balanced grass

Absence of nutrients

St. Augustine grass requires nitrogen and also iron to maintain its abundant, eco-friendly shade. Sandy soil might drain these necessary nutrients through the dirt swiftly.


A nitrogen-rich, slow-release fertilizer might provide your grass a needed increase to regain its green color. If you believe your grass requires a dosage of iron, try a liquid iron (likewise referred to as ferrous sulfate) treatment.

It might be handy to evaluate the dirt’s iron levels before treatment so you understand just how much iron to include. Mix 2 ounces of liquid iron with 3-5 gallons of water per 1,000 square feet of lawn.

Too much color


St. Augustine grass thrives in the sunlight! Also much color makes for miserable St. Augustine grass


If your St. Augustine grass is having a hard time in the color, consider trimming the trees and also bushes that obstruct the sun. You can additionally overseed the shaded area with a range of more shade-tolerant grass, like ryegrass.

Easy actions for greener St. Augustine grass

Slow-release fertilizers

A slow-release fertilizer that has an abundant balance of nitrogen, phosphorus, and potassium will feed your St. Augustine grass well for approximately eight weeks. Not just do slow-release fertilizers conserve your time, but they also aid the grass get nutrients gradually.

Great deals of sunlight

Your St. Augustine grass will certainly grow well in a bright backyard! If your grass is mostly shade, think about a different selection of grass seeds or a grass seed mix.

The ideal amount of water

St. Augustine grass has the capability to grow on extremely little water. It just requires about 3/4 of an inch of water twice a week. You might need to boost this amount if you have sandy dirt or a particularly warm week.

Often Asked Questions

How to make St. Augustine grass dark eco-friendly?

Frequently, a nitrogen-rich fertilizer is the vital to dark eco-friendly St. Augustine grass Nitrogen helps the grass develop chlorophyll. Chlorophyll is what gives grass and also plants their green shade.

Are coffee premises good for St. Augustine grass

Are coffee grounds good for St. Augustine grass

You may have listened to that grass appreciates a great mug of coffee just as high as we do! It is not the high levels of caffeine that the grass yearns for yet the nitrogen, phosphorus, as well as other minerals in the coffee grounds.

Coffee grounds act as a slow-release fertilizer for your grass This suggests the nutrients damage down slowly, allowing the ground and lawn to absorb them over an extended period of time.

Ought to me to make use of Ironite for St. Augustine grass

Ironite is a granulated mineral iron supplement for grass Usually, light eco-friendly St. Augustine grass is brought on by a lack of iron in the dirt. An iron remedy can be used to St. Augustine grass approximately 4 times a year to balance the iron in the lawn and create that stunning, eco-friendly grass you desire!

Take a soil sample to your local extension office. They can check it for iron levels as well as let you recognize simply exactly how much iron to relate to your grass.

Final Thoughts

There are a selection of reasons for lime green St Augustine grass It is best to diagnose the issue prior to you treat it. Whether you have fungi, bugs, or just a lack of nutrients, you can heal your grass and also have an intense environment-friendly lawn when again!

Avatar for Mutasim Sweileh

Mutasim Sweileh

Mutasim is a published author and software engineer and agriculture expert from the US. To date, he has helped thousands of people make their yards lush and thick.