Best Fertilizers for St. Augustine Grass – Our Top Picks

If a typical grass is to put up with extreme heat and humidity of areas like Florida and the Gulf States, it will not be other than the St. Augustine Grass.

It has blue-green blades that could form a dense turf and spread easily in your lawn, making it lush-green and delivering it an aesthetic touch of nature.

Apart from these qualities, St. Augustine grass is salt-tolerant, and thus, it becomes one of the best choices for coastal yards.

Its smoother turf makes it immune to heat and humidity, especially in the subtropical areas of the US.

It can improvise with low availability of water and harsh heat of the summer season, retaining its vibrant color regardless of the circumstances.

For a lawn having St. Augustine grass, you need to take care of certain things, like keeping it moist when it is in a developing stage.

While growing such grass, plugs are preferable, which can be placed 6-12 inches apart in your lawn.

You need to put a little extra effort to make your grass grow, and thus, it also requires the best quality of fertilizers to nourish it deeply.

In choosing the best fertilizer for St. Augustine grass, this article will help you to get the best products at affordable prices.

Best Fertilizers for St. Augustine Grass

While choosing the best fertilizer for St. Augustine, you will have to check the quality and condition of your grass and supplement the fertilizer with an adequate amount of water to bring out the best results.



Best Overall
Scotts Turf Builder Grass Seed Sun and Shade Mix
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Best Features
Scotts Turf Builder Starter Food
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Best Value
Scotts Turf Builder Thick’R Lawn Sun & Shade
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Advanced 16-4-8 Balanced NPK – Lawn Food
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Simple Lawn Solutions Liquid Fertilizer
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GreenView Weed & Feed
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Scotts Turf Builder Grass Seed Sun and Shade Mix

scotts turf builder best fertilizer for augustine grass

Hailing from the Scotts Brand, the Scotts Turf Builder Grass Seed grows a laudable quality of St. Augustine grass in your lawn by providing it the adequate moisture and tolerance to grow in the scorching heat of summer and spread through your entire lawn in just 5-10 days.

Its water smart plus technology locks moisture in the seeds and prevents diseases, making it grow healthily and fast. The quality of grass remains intact despite intense heat or prolonged shade. The grass thickens your lawn easily with a smooth and dense turf.

One of the most annoying problems of St. Augustine is that due to fungal turf diseases, your lawn would be left with some brown patches or bare spots. In this regard, Scotts Turf Builder covers this problem and spreads rapidly over bare spots and renders your lawn with a lush-green texture.

  • Spreads rapidly over your lawn
  • Water smart technology locks 2x moisture in seedlings to grow faster
  • Prevents diseases in grass
  • Can improvise with scorching heat and dense shade fine-bladed texture of grass
  • High drought resistance
  • Covers bare spots instantly
  • Might not suit in a Southern hot and dry climate, as the grass dies due to lack of moisture
  • Overseeding wouldn’t bring fruitful results
  • In some cases, you might have to reseed your lawn if there is crabgrass in it
  • Not easily spread. Along with a seed spreader, you might have to consider additional purchases

Scotts Turf Builder Starter Food

Scotts Fertlizer for St. Augustine

This product is going to work wonders with the newly planted St. Augustine grass in your lawn by boosting its growth and protecting it from harsh adversities like heat, humidity, low or excessive moisture, prolonged shade, and so on.

When you feed your grass with the Scotts Turf Builder Starter Food, you get up to 70% thicker grass, and it grows faster with a rate of 35%, in comparison with unfed grass. It will ameliorate seeding results and work well with sods and even grass plugs. It’s 25:24:4 ratio of nutrients is apt for developing and caring for lawns.

Winter seeding is the best time for this lawn food to effect.  It won’t sprout until spring, but you won’t need to do anything. The freezing and thawing that goes on all winter expands and contracts the soil and drives the seeds into the ground, thus saving your labor. Moreover, instead of just St. Augustine, it is suitable for any grass type.

  • Speeds up the growth of grass and strengthening of roots
  • The best fertilizer for newly planted grass
  • Reseeding would make the lawn more fertile
  • Provides a thick and smoother turf of grass
  • Works great with sods and grass plugs
  • Safe to use around pets and children
  • Doesn’t let the grass burn even in the most extreme heat
  • It is not available for sale in Florida
  • There might be consequences when crabgrass could grow in your lawn, for which you will have to reseed your lawn
  • Requires frequent mowing for fast growth

Scotts Turf Builder Thick’R Lawn Sun & Shade

Scotts Thickr Lawn Grass Fertilizer

This product from the Scotts Brand is a must use for St. Augustine grass and will be the best fertilizer for ensuring its regular growth and maintenance. It is a 3-in-1 solution for thin lawns to provide a thicker and healthier turf and protect it against harsh sunlight and prolonged shade.

This one is apt for the summer season and makes your grass healthier and thicker even in the scorching heat of summer. It promotes the growth of your grass, improving its soil quality, and clearing out weeds for an aesthetically pleasing texture of your lawn.

If this product is used with proper care, it can render up to 50% impressive results, including dense grass beds, strengthened roots, and lush green texture of the grass. It can also fill gaps in between vacant patches and empty or brown areas of your lawn in a few days, making it one of the best fertilizers for St. Augustine grass.

  • Fills empty gaps and brown patches in your lawn
  • Revives dry grass
  • Improves soil texture and enhances root development
  • A 40-pound bag can cover up to 4000 sq feet
  • Can result in 50% thicker lawn as compared to unfed grass
  • Faster seed germination than other fertilizers
  • Needs a dispenser or a spreader for effective application, thus, adding to more costs
  • Results may vary depending on the application
  • Might demand more water sprinkling for growing grass

Advanced 16-4-8 Balanced NPK – Lawn Food

Advanced 16-4-8 Fertilizer

The more you will appreciate this product, the lesser it will be. Advanced Balanced NPK- Lawn Food is all you need to make St. Augustine grass grow in your lawn instantly. You won’t have to put much effort, and this fertilizer will ensure strong roots and healthy grass in your lawn.

It is a complete lawn food that has a chemical balance of Nitrogen, Phosphate, and Potash in the ratio of 16:4:8 providing lush green texture to your grass on the one hand, and deepening of roots on the other. This fertilizer contains seaweed and fish for the enhanced growth of the grass.

It does not only work with St. Augustine. Still, it is apt for various grass types like Zoysia, Bahia, Fescue, Centipede, Buffalo, Florida Palmetto, Kentucky Bluegrass, and Ryegrass, making it a versatile fertilizer.

  • Easy to apply (sprayer+fertilizer for dispensing)
  • Balanced lawn food for enhanced growth
  • Covers 3200 sq. feet
  • Inexpensive and convenient
  • Fast results and covers bare spots
  • Evades moss and weeds
  • Prevents burning of browning of grass in extreme heat
  • Contains Chlorine that might end up drying the soil and killing the microbes that enhance the quality of the soil
  • Overuse might disrupt the chemical balance and cause soil degradation

Simple Lawn Solutions Liquid Fertilizer


This product is quite similar to the Advanced 16-4-8 Balanced NPK Lawn Food, but results differ. This liquid fertilizer is designed to build a thick and smooth turf of St. Augustine grass in your lawn by improving its soil texture and strengthening the roots for better tolerance of heat and lack of moisture.

This fertilizer has a convenient spraying system and is fortified with Nitrogen, which is healthy for the soil, providing it adequate nutrients and conditions for growth and avoids degradation by keeping those nutrients intact. It gives a thicker turf with a greener and healthier texture, delivering a majestic look to your ordinary lawn.

It doesn’t use harmful chemicals and pesticides and enhances the quality of the soil. It is suitable for all types of grasses instead of St. Augustine, like Zoysia, Palmetto, Kentucky Bluegrass, centipede, and buffalo.

  • Doesn’t use harmful chemicals and pesticides
  • Fortified lawn food out in out
  • Easy and convenient to use through spraying system
  • Safe for use around pets and children
  • Can improvise with excessive heat and low or excess moisture
  • Builds thicker turf than any fertilizer
  • 32 ounces work well with 3200 sq feet
  • You might need to apply it more often in some areas of extreme heat, and that might probably cause degradation due to overuse
  • Mostly available for commercial purposes so might not be available sometimes

GreenView Weed & Feed

greenview fertilizer for st augustine grass

This product will ensure the healthier growth of your grass by kicking out weeds. Nourishing the soil with abundant Nitrogen, and benefiting the environment by absorbing harmful chemicals in the air, thus putting all the reasons why it could be one of the best fertilizers for St. Augustine grass in your lawn.

It thickens the turf of your grass and reduces topsoil erosion. Further, it will help to filter rainwater, and many pollutants are occurring in dust or soot, hence promoting the healthy growth of grass in your lawn. GreenView Weed & Feed will make your grass efficient in converting Carbon Dioxide into Oxygen, aiding to clean the air.

The fertilizer kicks out almost 250 varieties of weeds in your lawn like dandelion, clover, plantain, chickweed, ground ivy, and thistle (as mentioned in the label of the product). Its MESA Nitrogen technology ensures a significant surge in growth and development of your grass and roots, without browning or burning. You must apply the product in a moist lawn for better results, and avoid using it when rain is expected after 24-48 hours of applying.

  • Suitable for all grass types instead of St. Augustine
  • Kicks out almost 250 varieties of weeds from your lawn
  • Ensures Constant turf growth
  • Environment friendly
  • Kills clovers and dandelions quickly and provides lush green texture to your grass
  • 7 lb covers about 2500 sq feet
  • Has a 27-0-4 NPK Formulation with no added phosphates
  • Prevents burning of grass
  • It might kill some of your desired flowers and grasses
  • Needs a spreader for effective application
  • Avoid using on St. Augustine in Florida as it might cause damage to the grass

Over to you

So, here were some of the best fertilizers for St. Augustine grass in your lawn that could be purchased easily from Amazon or Homedepot.

I hope this article was useful enough to give you an idea of an excellent fertilizer that can be used in your lawn, typically for St. Augustine Grass.

Use these products only after reading the instructions carefully to avoid damage to your lawn.

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