Best Fertilizer For St Augustine Grass 2022: Reviews & Buyer’s Guide

1. Simple Lawn Solutions 2. Simple Lawn Solutions 3.  Doc’s Super Juice
Advanced 16-4-8 Balanced Npk- Lawn Food Natural Liquid Fertilizer Liquid Aerating Soil Loosener- Aerator Soil Conditioner- No Mechanical Or Core Aeration- Simple Lawn Solutions Super Juice All In One Soluble Supplement Lawn Fertilizer

There isn’t a doubt that St Augustine Grass is one of the most magnificent turfgrasses available. It immediately enhances the beauty of your lawn and offers a pleasant allure. The aesthetical grass has a thick and robust appearance with the elegance of blue-green hues that embellishes the ground.

However, it requires deliberate maintenance to flourish. Apart from the minimum of four hours of sunlight per day, it also requires nourishing fertilizers regularly.

Choosing the best fertilizer for St Augustine Grass is not about purchasing just any bag; it is about the contents and quality of the product. It goes beyond the packaging and there are factors one should consider.


Factors To Look For While Buying A Fertilizer For St Augustine Grass

Fertilizers go hand in hand with the St Augustine Grass for healthy growth. There are factors like soil and timing that matter for this grass, but fertilizer remains its primary source of vitality. St Augustine Grass can grow healthy as long as it has the right fertilizers. These two factors are prevalent in determining the best fertilizer for St Augustine

The Ratio Of Contents

There are numbers given on the packaging of the fertilizers. For example,10-4-10, and may also have letters like N-P-K. It is a ratio of Nitrogen, Phosphorus and potassium in the fertilizer. 10-4-10 means it has 10% Nitrogen, 4% Phosphorous and 10% Potassium. In a 100 pounds of the package, it means there will be 10 pounds of Nitrogen, 4 pounds of Phosphorous and 10 pounds of potassium.

An ideal ratio is 3-1-2 in the overall package, it can be 6-2-4, or 9-3-6, but this is a general guideline. Less phosphorus and potassium and abundant nitrogen as St Augustine grass are great in absorbing nitrogen.

Release Of Nitrogen

As the grass is efficient in absorbing nitrogen, it is important to use a fertilizer that has a slow release of nitrogen. The slow-releasing nitrogen will act as a long-lasting source for your grass. People tend to think that faster growth and darker green complexion from the fast release is actually better, but that is not true in the case of St Augustine grass.

Slow releasing fertilizer also proves to be much safer for the environment, and the health of your lawn and the atmosphere of your house. Hence, best lawn fertilizer for st Augustine grass will offer the slow-release with a higher content of nitrogen.

Top 8 Best Fertilizers For St Augustine Grass

1. Advanced 16-4-8 Balanced Npk- Lawn Food Natural Liquid Fertilizer- Spring & Summer Concentrated Spray – Any Grass Type- Simple Lawn Solutions

Advanced 16-4-8 Balanced Npk- Lawn Food Natural Liquid Fertilizer

As St Augustine grass requires a good content of nitrogen to grow, Simple Lawn Solutions is bringing you a product with the ratio of 4-1-2 for N, P and K. It is offering you a great quantity of nitrogen that will keep your grass greener and offer better growth.

The slow-releasing fertilizer is great and can cover up to 32,000 square feet of land with its 2.5 gallons of quantity. More importantly, you are also getting a 16-4-8 sprayer bottle to use. However, it is also compatible with other pumps and hose-end sprayers. The 16-5-8 combination is perfect for your St. Augustine grass.

Packed with the blend of macronutrients, the fertilizer also offers seaweed to enrich the soil further for healthy growth. It is a completely natural and organic product with high quality of safe and liquid nutrients. Hence, this makes it safe for kids and animals, like pets.

The lack of chemicals proves to be beneficial for the grass, as it does not damage it in any manner. However, the fertilizer will not cure any diseases, fungus, or other problems your grass may be going through.

It is a great selection to save your turf and prevent it from getting any of those problems. Manufactured in the USA, it is also a great soil enhancer. Therefore, it is the best fertilizer for St Augustine grass.


2. Liquid Aerating Soil Loosener- Aerator Soil Conditioner- No Mechanical Or Core Aeration- Simple Lawn Solutions

Liquid Aerating Soil Loosener- Aerator Soil Conditioner- No Mechanical Or Core Aeration- Simple Lawn Solutions

It is vital for the roots of your grass to receive adequate levels of water and air for the absorption of nutrients and overall nurturing.

Hence, a liquid soil aerator may do a commendable job for your St Augustine grass turf. It loosens the tight soil and hardpans to break them aptly for the water and air to easily receive the downwards movement that is essential to get to the roots.

Bonus points, it is also a fantastic soil conditioner for your grass. It will easily enhance the soil and detoxify it from any impurities and harmful agents. Thus, it remarkably improves the growth of the grass by enabling it to receive nutrients, and is not harmful.

If your soil suffers from colloids, claws, hard dirt and other such symptoms, then it will easily decrease the compaction and break all of these problems apart, easily. If your water stands still on the soil, it won’t anymore. It promotes drainage for the water with its soft flow.

More importantly, it is also a completely safe and natural product with non-toxic contents. The Aerator is biodegradable and safe for the environment. It is backed by the reliance and experience of a family business that has been successfully running for over two decades in the USA.


3. Super Juice All In One Soluble Supplement Lawn Fertilizer

Super Juice All In One Soluble Supplement Lawn Fertilizer

If you’re looking for a single stop for your soil problems, then Super Juice is bringing you an all-in-one fertilizer. Prominently used in the golf courses, it offers a complete and balanced fertilizer for your lawn.

It comes in a dry mix, and you will need to add water and use the hose-end sprayer for application. Super Juice is also cost-effective, offering to cover up to 43,000 square feet of land at complete concentration. For the growth and nurturing, it is the best fertilizer for St Augustine.

Super juice offers the ratio of 14-2-4 for the exceptional growth spurt of the grasses with a deep green complexion. Are you concerned about the environment? It does not create any waste or sub-products, and does not add to bio-waste either.

The fast-absorbing formula of Super Juice shows results within 4 hours, instead of taking weeks for results. Hence, it is great for those who seek to revitalize their grass turfs quickly. Specifically, it is also a great choice for seasons when the absorption slows down, like winter, since spring and fall are when the grass is ready to rejuvenate.

One of the reasons why it gets used with water is because it dissolves in the soil and reaches the roots, while other fertilizers fail to achieve it and get stuck in the top. It is very simple to use and have an economically convenient packaging.


4. Scotts Turf Builder Southern Triple Action

Scotts Turf Builder Southern Triple Action

Another all-round, multi-purpose fertilizer on the list is none other than Scotts Turf Builder for Southern grasses, which makes it the best fertilizer for St Augustine grass. The unique triple action formula allows it to eliminate the growth of weeds, by killing them, including clover, plantain and other stubborn weeds. Hence, you won’t have to pull them out or get rid of them manually. With Scotts, you already get most of the weeds taken care of.

You get a plus point as it also prevents fire ants, fleas, mole crickets and many other insects and parasites. No more annoying infestation that could potentially harm your lawn, or even enter the house and cause a nuisance. More importantly, it has a long-lasting effect and may work for up to 6 months in prevention and termination of any of the insects.

Its third action enables it to feed adequate nutrients to the grassroots and promotes thick and green growth of the lawn. Proper nutrients will find their way to the depth of the roots, and you will have a lush green layer covering your lawn. It also enhances the growth to be robust enough to withstand intense heat and still flourish, and offers them a fantastic hold against droughts.


5. Scotts 17520 EZ Seed Sun & Shade Patch For St. Augustine Grass

Scotts 17520 EZ Seed Sun & Shade Patch For St. Augustine Grass

Here comes another fantastic innovation to the list. The Scotts 17520 EZ Seed Sun & Shade Path for St. Augustine Grass is a dual-purpose product. It works as a mulch, and fertilizers and offers a rejuvenating growth to your St. Augustine Grass.

If your yard or lawn gets traffic, even light, it ends up damaging the grass. St. Augustine is a medium to high maintenance grass that can’t withstand too much of traffic.

Hence, it is advised to keep the traffic light and don’t walk on the grass too much. But you can’t completely prevent it, as there will always be animals and some people walking on it by mistake. You yourself have to walk on it to nourish it.

To recover from that damage, Scotts offers a 60% faster repair solution for your turf. As it is ready to use, you can easily prepare it to apply it and then water on top of it.

Water is very important for the product to reach the roots. It offers fantastic absorbing capacity, and is able to hold and absorb six times its weight in water. Your grass will always look green and full of life. Good news! It does not have any grass seed, and it is like a dust powder.


6. St. Augustine Grass Weed And Feed With Penoxsulam

St. Augustine Grass Weed And Feed With Penoxsulam

With the land covering power of up to 14,000 square feet and the ratio of 17-0-7, here is the single product that is ‘made for St. Augustine Grass.’ The fertilizer comes with 17% Nitrogen, 0% phosphorus and 7% potassium. It also offers 30% of poly-coated and sulfur-coated urea that is specifically designed for St. Augustine Grass.

For best results, it is better to apply it when the turf is wet and freshly watered. It takes around two weeks for it to dry out and start showing results. More importantly, as we know that slow release is an important factor for feeding, this one offers up to 8 weeks of feeding with the slow release.

Slow-release means you don’t have to frequently fertilize the lawn and this one offers up to 8 weeks. Hence, you only have to use the fertilizer once every two months.

It also makes the product feasible. Its higher nitrogen content offers a fantastic green and thick growth of the St. Augustine Grass without running out quickly. Higher potassium content also means that your turf will also have a healthy growth of the roots. So for overall healthy growth from top to bottom, this one is the best fertilizer for St Augustine grass.


7. Davespestdefense Ferti-lome St. Augustine Weed And Feed 15-0-4

Davespestdefense Ferti-lome St. Augustine Weed And Feed 15-0-4

DavesPestDefense is made for the grasses like St Augustine, to help in delivering the best defence. The anti-pest qualities of the product make it great, as it keeps the insects and parasites away. It is a weed and feed. Hence, it will eliminate the growth of weeds and the list of weeds it works against is extensive.

One of the best times to use this fertilizer is during the spring, as it will bear the best results. It also comes with a fantastic 15% nitrogen quantity and 0% phosphorus, with 4% of potassium. You know what that means, right? It means exceptional growth and care for your St Augustine Grass.

A single package can cover around 2,500 square feet. It means that the product is one of the best lawn fertilizer for St Augustine grass. Perfect for those who have lawns and to use for an extended period.

Among the various types of fertilizers available on the list, this is the one where you don’t have to get confused. If you’re looking for a simple weed and feed, this one will do the job for you.

It is one of the best because of its nitrogen contents and great defence against weeds and pests. The fertilizer aptly nourishes the grass turf, as well. For the vibrant dark green, this is fantastic.


8. Ferti Lome16lb St Aug Weed Feed

Ferti Lome16lb St Aug Weed Feed

Ferti Lome comes with the instructions to use in grasses like St. Augustine. It is one of the classic weed and feed. If you’re looking for a product that will get the job done and falls on the feasible end of the affordability, then this is the product for you. It is able to terminate and prevent the growth of unnecessary weeds of the large variety and suitable for any weather.

It also has 15% nitrogen and 4% potassium with %0 phosphorus. Hence, it is completely healthy for your grass. More importantly, it is organic and wouldn’t harm the environment, especially since it is a slow-releasing product and would last long for your St. Augustine grass.

More importantly, it offers feed options that allow your turf to accumulate adequate nutrition and other supplies without any restriction. The 16 lbs of the product can cover up to 2,500 sq feet, making it perfect for lawns.

It comes in convenient packaging, and it is fairly easy to use. More importantly, it is great for varying soils. Just make sure to get the soil tested before using the fertilizers. However, it is suitable for your St. Augustine Grass.



Everyone has a unique taste and requirements regarding the appearance of their lawns. Some want a deep green and grassy field, while others like mowed down and levelled fields. There are various soils with varying contents of macro-nutrients. Some require additional tweaks, while others are perfect for St Augustine. As there isn’t a single product aimed to offer everything, we brought you the list of best fertilizer for St Augustine grass with versatile choices. Hence, these selections will fit your individual requirement from aerating to weed and feed, coating and much more. This is your single stop for the best fertilizers for St Augustine.

Some Essential Tips Regarding Fertilizers

  • The best time to start with fertilization is around spring and fall. It is the time when St Augustine grass is most active.
  • Ensure that your turf does not have chinch bugs and white grubs or any other insects problems. You may have to conduct treatment before planting the St Augustine grass or fertilizing it.
  • St Augustine grass does not require excessive water content. So, the best way to know when it requires water, is if it shows dullness in colour or its blade structure is inappropriate. Early morning irrigation is a great way if you’re in an area with apt sunlight. By the day, water will dry out with the sun.
  • As commonly known, St Augustine is suitable only for light traffic. So make sure trampling of the grass is minimum with less foot traffic. Pave a separate path or lay down the tile work where St Augustine grass is not laid out to offer a pathway to the people and animals. Fencing and other options are also great to prevent animals from ruining your lawn.
  • It is important to use a lawnmower, and it should have a height setting of around 2.5 to 3 inches. This method will ensure your grass gets an abundant amount of nutrients and nourishment with growth.
  • Although most of the fertilizers will control weeds for you, if there is any pre-grown or weed, then using herbicides is a good way to eliminate them. Make sure the temperature is below 90 degrees Fahrenheit to prevent damage to the lawn.
  • Test the soil for the PH levels and learn about the various importance of PH level, since St Augustine grass may lack iron due to PH levels higher than 7.
  • While nitrogen, phosphorus and potassium remain the prominent choices for the St. Augustine’s growth, other macronutrients are equally important but usually require less quantity like magnesium, iron, zinc and others.
  • Aerating is an important process that would enable the fertilizer and all other essential nutrients to find their way to the roots and get absorbed by the grass. While there are aerating tools, you may also use one of the fertilizers that offer similar functionality.