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Top 6 Best Liquid Lawn Fertilizer Reviews: Safe & Effective!

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It is no secret that liquid fertilizers help grow your lawn more quickly than granular fertilizer products since every drop of liquid has equal nutrients. Not to mention, liquid fertilizer has a straightforward application process with a sprayer.

However, the liquid form is also often easy to overuse and expensive. You will want to choose the fertilizers carefully so as not to break your bank.

Keep reading Growingherbsforbeginners.com, and this article will help you find the best liquid lawn fertilizer for your yard!

Best Liquid Lawn Fertilizer Reviews

BAXIA TECHNOLOGY BX-SL-101 Solar Lights OutdoorAdvanced 16-4-8 Balanced NPK - Lawn Food
Aityvert B073XZXGQG Solar LightsScotts Turf Builder Starter Food
Hoont GL-13158 Led SpotlightScotts Liquid Turf Builder Lawn Food Fertilizer
Aootek DG36-04 New Solar LightsSuperior Nitrogen & Potash 15-0-15 NPK
Solar Light Mart Mini 50X SLM81230Extreme Grass Growth Lawn Booster
Solar Light Mart Mini 50X SLM81230envii Greenkeeper's Secret - Liquid Lawn Fertiliser

#1. Simple Lawn Solutions Advanced 16-4-8 Balanced NPK – Best Overall

Advanced 16-4-8 Balanced NPK - Lawn Food


  • Type of fertilizer: Liquid concentrate
  • Type of formula: All-rounders
  • NPK ratio: 16-4-8
  • Size: 32 ounce
  • Weight: 3 pounds
  • Suitable for: All kinds of grass

Highlighted Features:

The Simple Lawn Solutions Advanced 16-4-8 Balanced NPK is the best liquid lawn fertilizer for all grass types, thanks to its balanced blend of macronutrients and concentrated form.

The fertilizer contains a balanced NPK ratio which is 16:4:8 respectively. The liquid is rich in Nitrogen and Potassium, so you can expect fast-growing green grass from the root. The Phosphorus, meanwhile, is kept at a minimum ratio to ensure that it will not spoil the soil pH.

It is also an addition that the NPK content is pure and clean, made from organic and natural seaweed and fish. As a result, the liquid is safe for use at home, even with kids and pets.

We also like the spraying part. It fits almost any standard garden hose and is ready to spray by changing the knobs.

The fertilizer is expensive and unable to cover the 3200 square feet as advertised. From our test, it did well, about 2000 square feet.


  • Fast-effective concentration
  • Organic and natural ingredients
  • Decent smell like seaweed
  • Easy liquid application with any garden hose


  • Expensive liquid
  • Smaller coverage than advertised

#2. Scotts Turf Builder Starter Food – Best For Starters

 Scotts Turf Builder Starter Food


  • Type of fertilizer: Ready to use
  • Type of formula: All-rounders
  • NPK ratio: 7-12-15
  • Size: 32 ounce
  • Weight: 2.8 pounds
  • Suitable for: New lawn green

Highlighted Features:

We picked the Scotts Turf Builder Starter Food in this list because of its affordable price and convenient design. Together, they make this liquid fertilizer a good choice for starters who wonder what and how to feed the new lawn.

The Builder Starter Food by Scotts Turf is a ready-to-use liquid, meaning that you can spray it out of the box with no concern about mixing water or ratio. Simply connect a hose and choose one of the three modes available: Off, Feed, or Water Only.

This 32-oz bottle can cover 600 square feet, considering the feed function. Every drop consists of seven parts of nitrogen, 12 parts of Phosphorus, and 15 parts of potassium. You should divide the liquid three times. The first spray when the seeds start sprouting, the second spray one week after, and another spray the following week.

We have tried this product and witnessed that the lawn grows fast thanks to the high ratio of Phosphorus and potassium. Nonetheless, the yard is not as green as expected since the lack of nitrogen.

Still, we cannot expect too much from such a cheap fertilizer, and we do find a small part of improvement. The switch is slim and requires a solid fiction to operate.


  • Affordable liquid fertilizer
  • Compact and easy to hold in hand
  • Three modes available
  • Suitable for the any type of grass to grow


  • Lack of nitrogen
  • Slim and hard-to-move switch

#3. Scotts Liquid Turf Builder Lawn Food Fertilizer – Best Budget

 Scotts Liquid Turf Builder Lawn Food Fertilizer


  • Type of fertilizer: Ready-to-use
  • Type of formula: phosphorus-free fertilizer
  • NPK ratio: 29-0-3
  • Size: 32 ounce
  • Weight: 3 pounds
  • Suitable for: All kinds of grass

Highlighted Features:

Here comes another budget-friendly liquid fertilizer from Scotts. It is the Liquid Turf Lawn Food, a phosphorus-free fertilizer.

You can use this liquid after using the Builder Starter Food at the early stage of the grass. At that time, the solid already holds enough Phosphorus and needs more nitrogen to build blocks of proteins.

The Scotts Liquid Turf Builder Lawn Food contains a nitrogen-loaded ratio with no phosphorus, which is 29:0:3. A little potassium is also added to stimulate a fast-growing and lush green lawn.

The application is as easy as the Builder Starter Food bottle. You simply connect the bottle with your hose pipe and trigger the switch to feed or water the lawn at a time.

A bottle of 32 ounces can cover up to 2000 square feet, depending on your hose’s pressure and the water flow.

So far, so good – except that the plastic packing and nozzle look cheap and easy to break. Moreover, you should not overuse this liquid since excessive nitrogen can harm the soil and some plants.


  • Good for budget
  • Decent spraying coverage
  • No phosphorus content
  • Liquid nitrogen fertilizer to make grass green


  • Cheap plastic parts
  • Ability of overuse

#4. Superior Nitrogen & Potash 15-0-15 – Best For Rough Lawns

Superior Nitrogen & Potash 15-0-15 NPK


  • Type of fertilizer: Liquid concentrate
  • Type of formula: phosphorus-free fertilizer
  • NPK ratio: 15-0-15
  • Size: 32 ounces
  • Weight: 2 pounds
  • Suitable for: All kinds of grass

Highlighted Features:

Superior Nitrogen & Potash 15-0-15 is also a phosphorus-free fertilizer like the third product; however, it balances nitrogen and potassium content to be 15:15.

Such a combination stimulates blade formation and root strength, which leads to top green and growth. The liquid is extra helpful for tough grass since it requires more essential nutrients in the blades to grow fast and healthy under a wide range of weather.

This 15-0-15 fertilizer is even effective under low-light conditions so that you can use it in areas with shorter days and growing seasons.

It is recommended to space application times evenly. The Superior Nitrogen & Potash 15-0-15 has a concentrated formula, and any overuse might dry out or damage your grass.

Purchase the big bottle of 2.5 gallons if you have an entire big lawn. The coverage ability is up to 32,000 square feet. You should use the liquid once in spring, another in the mid-summer, and again at the end of August.

However, the only drawback that prevents you from buying is the cost.


  • Concentrate formula for quick effect
  • Balance of nitrogen and potassium
  • Made from quality organic ingredients
  • A big bottle that covers wide grass


  • Very expensive
  • Required to mix the liquid with water

#5. Simple Lawn Solutions Extreme Grass Growth Lawn Booster – Best For Lawn Growth

 Extreme Grass Growth Lawn Booster


  • Type of fertilizer: Liquid concentrate
  • Type of formula: Starter fertilizer
  • NPK ratio: 6-18-0
  • Size: 32 ounce
  • Weight: 2 pounds
  • Suitable for: Warm-season grass types

Highlighted Features:

As its name suggests, Simple Lawn Solutions Extreme Grass Growth Lawn Booster is designed with a quick boost of essential nutrients that help your grass grow vertically and laterally within several days.

The liquid contains a high phosphate concentrate (6-18-0), energized with a small amount of nitrogen, humic acid, and fulvic to feed new sod and seeding. All ingredients are organic and safe to use at home. You do not have to worry about the safety of your kids and pets.

We also appreciate that the manufacturer includes a hose-end sprayer coming with the bottle. You need to lend a garden hose, and the liquid is ready to use for the green lawn. There is a knob to adjust the water flow as you wish.

Ideally, one bottle can cover up to 3200 square feet.

A small reminder for using this product is to make sure your local garden laws allow the use of Phosphorus in fertilizers. Also, Extreme Grass Growth Lawn Booster lacks the content of potassium – an essential substance that helps your lawn cope with extreme cold and drying. Thus, we only suggest using this fertilizer in warm regions.


  • Suitable for top green and growth
  • Quality and safe ingredients
  • Convenient sprayer
  • Good coverage for the size


  • Expensive
  • Not for cold-weather lawn types

#6. envii Greenkeeper’s Secret – Best For Cold-season Lawns

envii Greenkeeper's Secret - Liquid Lawn Fertiliser


  • Type of fertilizer: Ready to use
  • Type of formula: All-rounders
  • NPK ratio: 7-15-19
  • Weight: 2 pounds
  • Suitable for: All kinds of grass

Highlighted Features:

We couldn’t finish this best liquid lawn fertilizer list without introducing the envii Greenkeeper’s Secret.

Although the bottle is small, it contains an effective bio-stimulant formula that enhances root growth and resistance to rain or drought.

The NPK ratio is 7-15-19, with a high potassium content. Potassium focuses on grassroots health, making the lawn greener and stronger naturally rather than a short-term boost. The enhanced roots are also resilient to extreme weather. Thus, we recommend this liquid for cold-weather grass.

You can see the noticeable improvement within seven to 10 days, then retreat the fertilizer after six weeks.

The liquid seems expensive considering the bottle size and the limited coverage of 300 square meters. However, you should know that all ingredients are natural and safe. Even the container is recycled from plant-based materials.

The biggest downfall for us is the bottle’s short connector. Without a designated hose-end sprayer attachment, you cannot connect it with a standard garden hose without a designated hose-end sprayer.


  • Effective bio-stimulant technology
  • Helpful to enhance grass health from the roots
  • Good for cold-season grass
  • Environmentally-friendly ingredients and container


  • Expensive and small coverage
  • Short and small hose-end attachment

Benefits Of Liquid Lawn Fertilizers

Benefits Of Liquid Lawn Fertilizers

Liquid fertilizers are appropriate lawn care for dry or new grass that needs immediate nutrients to repair and grow in a short time. Liquid can reach from leaves to root equally and thus, be absorbed quickly through the foliage.

While granular fertilizer requires filling the spreader with pellets, you do not have to work up a sweat to apply the liquid fertilizer. Simply snap the bottle onto a hose and spray it across your lawn.

Lawn liquid fertilizers aid in plant growth but are not effective on your grass prolonged, and you need frequent applications. Unfortunately, they are expensive.

It will be wise to use liquid fertilizers for temporary nutrients and apply an additional granular lawn fertilizer once every few months.


  • Nutrients are equally available to the grass
  • The application process is straightforward
  • Grass becomes better in a short time


  • A growth surge happens sometimes
  • Reapplications are more frequent
  • Liquid lawn fertilizers are typically expensive
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How to Buy Liquid Lawn Fertilizers?

Benefits Of Liquid Lawn Fertilizers

NPK Numbers

You do not need to understand the components of liquid fertilizers like a chemist. However, an overview of their nutrients helps choose the best products for your grass.

Most fertilizers represent a mix of nitrogen (N), Phosphorus (P), and potassium (K) in different ratios. For example, if the label says 16-4-8, there are 16 parts of nitrogen, four parts of Phosphorus, and eight parts of potassium in one bottle.

  • Nitrogen (N)

Nitrogen is the most required nutrient that fuels the dark green color and vegetative growth of foliage, branches, and stems. If you figure out that your lawn turns yellow or it appears stunted with slow growth, then it is time to add nitrogen to the soil.

However, you should know that too much nitrogen results in over top-growth and various problems. A good rule of thumb is to have one pound of nitrogen per one thousand square feet.

  • Phosphorus (P)

Phosphorus is a maximum growth stimulant in the root, seeds, and flower formation. Unlike nitrogen washed away over time, Phosphorus remains in the soil and increases its acid level.

We suggest adding much of this nutrient only during new growth and when the pH ranges from 5.5 to 7. At that time, a soil test kit is required to measure soil health.

  • Potassium (K)

You should add more potassium to stimulate an overall healthy lawn against diseases and tolerance during weather changes. The nutrient tends to stay in the soil and be used by growing vegetables.

Additional Nutrients

Besides the three primary nutrients, there are additional components in smaller quantities, such as:

  • Calcium (Ca) improves the growth of the plant’s cell walls.
  • Iron (Fe) activates the creation of photosynthesis and chlorophyll effectively.
  • Magnesium (Mg) assists the repair process and works with iron to generate components of chlorophyll.
  • Sulfur (S) is helpful for the growth of seeds by building proteins.

Special Formulas

Not all fertilizers have all NPK and other components, and we can divide them into some groups:

  • All-rounders: Typically, the numbers are 3:1:2 or 1:1:1 – perfect for treating nutrient deficiencies, and standard lawn maintenance.
  • Nitrogen-only fertilizers: No other nutrients exist in the formula. The fertilizers maximize lawn growth or combat severe nutrient deficiency.
  • Phosphorus-free fertilizers: Some local areas ban Phosphorus from home fertilizers. Thus, you can check the law and buy phosphorus-free bottles.
  • Starter fertilizers – Specially designed for new grass with a high phosphorus content, the fertilizers trigger the growth of fresh seed, sod, and plugs.
  • Potassium-only fertilizers: Generally, these fertilizers with potassium only are used just before winter.

Types Of Grass Liquid Fertilizers

You can also divide the liquids into three types of fertilizers:

  • Water-soluble fertilizers: They can be dissolved in water. You can control the precise amount of nutrients and cut back on the packaging waste.
  • Liquid concentrate: If you are looking for fast-acting fertilizers, go for this type to push your lawn forward. It has a high content of nutrients.
  • Ready-to-use fertilizers: They are perfect for newbies who do not know how to mix the formula of the fertilizers. Or simple, even if you have used liquid fertilizers but do not have time.


How Do Liquid Lawn Fertilizers Work?

Liquid products feed lawn in two ways: through the soil into the roots or through blades known as foliar absorption.

The second method is quick and direct, so you can almost see an immediate change in lawn growth.

When Should I Use Liquid Fertilizer For Lawn?

This type of fertilizer is commonly used after the first flush and in the growing season.

In addition, based on your types of grass, you can apply fertilizers through the spring and summer for warm-season grass and the fall for cool-season one.

Do not spray the fertilizers on windy days since the wind might disrupt the liquid.

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How To Apply Liquid Lawn Fertilizer?

It is based on the types of liquid fertilizers you might need to add water or use the bottles out of the box. Then, use either sprayers or sprinklers to feed your grass.

Sprayers consist of garden hoses, faucets, and regular spraying attachments. Spread the liquid evenly across the lawn. This way, you can apply small quantities of the nutrients from the container.

The Sprinkler system is also helpful to reduce the risks to pets and children since it sprays fertilizers from the root level and in small amounts.

How Long Will Liquid Fertilizer Last?

Since most liquid fertilizers apply through foliage more than the root, their impact does not last long.

You should spray the liquid every three or five weeks during the growing grass season.

How To Store Liquid Fertilizers?

It is harder to store liquid fertilizers over winter than in warmer months. That time, you should keep the remaining liquid in poly tasks with a gravity of 1.5 and more.


It is no longer hard to choose the best liquid lawn fertilizer products once you read this article. Save the buying guide to understand the components of liquid fertilizers for grass and look at the top six reviews.

Advanced 16-4-8 Balanced NPK is the best overall, with a rich in nitrogen and potassium and good phosphorus content to help balance the solid nutrients for your grass.

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