8 Best Lawn Fertilizer Reviews in 2021 – A Comprehensive Guide

Wonder why the grass looks greener on the other side? Well, it might be because a good lawn fertilizer is used there. In this article, we will be focusing on the best lawn fertilizers. Not only that, we will be including some important information about these fertilizers along the course of writing this article.

How To Choose The Best Lawn Fertilizer?

There’s a lot of fuss on how to choose the best lawn fertilizer. This is why we have decided to include a guide to help you choose the best fertilizer for grass below.


The numbers on your fertilizers are very important as they determine if you will be going home with a good fertilizer or not. Sometimes, you see something like ‘NPK 15-4-8’ and wonder what it means. In simple terms, it is the percentage of nitrogen, phosphorous and potassium in the fertilizer. With an NPK 15-4-8 combination, it means there is a 15% concentration of nitrogen, 4% of phosphorous and 8% of potassium.

In general, the importance of nitrogen is to help make the plants look lush and green. Also, phosphorus helps to strengthen the roots of the plants while potassium helps to fight drought and diseases. In light of this, when selecting a fertilizer for your lawn, make sure you check the NPK combination and ensure you choose the one that suits your needs. However, worthy of note is that phosphorous can contaminate water. So, before making your buying decision, keep a tab on the phosphorous level.

Organic Or Synthetic?

You have a choice of choosing the process which your fertilizer is made. You can either go for synthetic fertilizers or the organic ones. Synthetic fertilizers are made from different processes and they tend to include different minerals and gasses. Often, these fertilizers produce quick results but when applied in the wrong way, they can burn your grass. Besides, synthetic fertilizers can lead to environmental and physical problems if they find their way into the water supply.

Organic fertilizers, on the other hand, are made from living organism waste like manure or blood and bone meal. These fertilizers do not show results as fast as the synthetic ones but they are mostly safe for the environment, animals and people in general. We advise that organic fertilizers should be a priority over synthetic ones. This is because they do not cause harm to the environment.

8 Best Lawn Fertilizer Reviews in The Market

After making an extensive research on the best lawn fertilizer, we have compiled a list of some of the best ones out there and reviewed them below:

1. Miracle-Gro 1001233 Water Soluble All Purpose Plant Food-5LB, Green

Do you want a lawn fertilizer that works immediately? Look no further because the Miracle-Gro 1001233 Water Soluble All Purpose Plant Food is the one for you. When you use this fertilizer, you will begin to see your lawn become lusher immediately. This is because of its impressive plant nutrient formula of 24-8-16 mix of 24% nitrogen, 16% potassium and 8% phosphorus. With this water-soluble, rest assured that you will witness rapid growth in your plants within a week.

Besides, this is an all-purpose fertilizer as it works for all plants. Be it grass, flowers, vegetables or trees, it works perfectly on them. However, the fertilizer should only be applied to the plants every 2 weeks. This is to prevent the plants from burning up. Also, you can use a watering can or the Miracle-Gro’s Special Garden Feeder to apply the fertilizer. Not to mention, it is also available in a 10lb, 3lb, 0.5lb and 1.5lb. With this, you have a choice in choosing the size of fertilizer that suits your needs.

Worthy of note is; you need to dissolve the fertilizer in water before use. When dissolving the fertilizer for plants outside, mix one teaspoon per gallon. Also if the plants are inside, use ½ teaspoon of the fertilizer per gallon. Besides, the instruction for mixing of the fertilizer is included in the packaging of the fertilizer.


  • It is an all-purpose fertilizer
  • It comes with an easy to follow instruction for use.
  • The fertilizer works immediately
  • Safe to use on all plants


  • It doesn’t dissolve quickly

2. Simple Lawn Solutions Advanced 16-4-8 Balanced NPK - Best liquid lawn fertilizer

The second our list is the Simple Lawn Solutions Natural Liquid Fertilizer. It is the ideal fertilizer for your grass or lawn. It has a perfect 16-4-8 combination of nutrients that will make your grass grow well and look greener. Besides, this fertilizer also contains seaweed and fish which is known as a source of nutrient to the soil and plant. Not to mention, this fertilizer doesn’t contain any chemical and every ingredient used are purely organic. With this, rest assured that the fertilizer won’t burn up your lawn.

Furthermore, with its complete Nitrogen, Phosphate and Potash formula, rest assured that the grass will get all the necessary nutrients to grow. Not only that, but the roots will also become healthier and stronger. This is best liquid lawn fertilizer which means you do not need to go through the stress of mixing again. Just get your garden hose, hook the fertilizer to it, and start spraying. However, to ensure that the fertilizer reaches the roots of the grass, make sure you water the lawn after applying the fertilizer.

Also, it is suitable for all type of grass. Just apply it and you will begin seeing improvement in your lawn in no time. In conclusion, this is an amazing fertilizer for your lawn. However, you need to keep away your pets or children from the lawn after applying the fertilizer.


  • It is easy to use
  • The fertilizer doesn’t burn the grass
  • It helps to fill in bare spots


  • Sometimes, the bottle for dispensing the fertilizer won’t work

3. Milorganite 0636 - Best organic fertilizer

Do you want a fertilizer that assures that your grass becomes lush and grows thicker? Look no further because the Milorganite 0636 Organic Nitrogen Fertilizer is the fertilizer you should be looking at. One good reason why this fertilizer makes your grass greener is that it contains 4% of iron. With this, rest assured that your lawn will ‘pop' which is what most lawn owners want. Not to mention, its NPK combination is 5-2-0 which means there is no potassium in the fertilizer.

Because of the lack of potassium, endeavour to wet the lawn frequently after using the fertilizer. If there is no regular supply of water, it is advisable not to use this product. Also, this product is 100% organic and it doesn’t burn the grass when it is used. Besides, the fact that the fertilizer is organic makes it harmless for kids and animals. However, it has a terrible smell which might take some time to die down. But, you can speed up the process of eliminating the smell by watering the lawn after applying the fertilizer.

Worthy of note is that this product is of high quality as it meets all the EPA quality standards. Finally, this is a best organic fertilizer that aids the growth of your grass without burning it. However, note that this fertilizer doesn’t aid root growth.


  • It doesn’t burn the plants
  • It is EPA-certified
  • Friendly to kids and pets
  • 100% organic


  • It has an offensive smell

4. Safer Brand Ringer Lawn Restore, Lawn Fertilizer

If your choice is an odourless fertilizer, then the Safer Brand Ringer Lawn Restore Fertilizer is an option. This fertilizer is organic and it has an NPK combination of 10-0-6. Besides, it is a plant-based nutrient giving fertilizer which means your grass won't burn after use. Besides, the absence of manure, poultry litter and biosolids in the fertilizer ensure that it doesn't give out the odour. In light of this, you can use the fertilizer and still breathe in clean fresh air after.

Worthy of note is that it contains a high level of phosphorous. With this, rest assured that your grass will start to produce a deep green colour in no time. However, when phosphorus is high, it can lead to the water around becoming contaminated. This is why it is advisable to not use the fertilizer close to a water body. Besides, there are some states in the USA that prohibit the use of fertilizers with phosphorous. Also, the ideal time for using the fertilizer is; early spring, mid-summer and during fall.

Furthermore, it has an impressive concentration of nitrogen and potassium which also helps in strengthening your lawn. Finally, the fertilizer can cover up to 5,000 square feet of land.


  • It doesn’t burn the grass
  • 100% organic
  • It is odourless
  • Safe for pets


  • None

5. Scotts Snap System- Snap Pack- Lawn Fertilizer

The Scotts Company is a household name when it comes to farm products like pesticides and fertilizers. The Scotts Snap System Snap Pack Lawn Fertilizer is one of their amazing products. It has an NPK combination of 26-0-4. With the high concentration of nitrogen in the fertilizer, rest assured that the grass will grow faster and their roots will become stronger. Not to mention, since nitrogen also aids photosynthesis, you will notice that your grass will also become greener and fresher.

Furthermore, its low potassium and phosphorous level help in strengthening the grass and improve the soil's health. Besides, another good thing about this fertilizer is that it can be applied at any time of the year on any type of grass. Not to mention, you can apply the fertilizer on up to 4,000 square feet of land. Also, it is 100% safe for pets and kids and you can have them playing on the grass immediately after applying the fertilizer.

Again, this is one fertilizer that is easy to use. When used with the snap spreader by Scott, spreading of the fertilizer becomes an easy task. However, you need to watch the spreader and ensure it doesn’t sprout too much fertilizer at a time as it sometimes does.


  • Safe for children and animals
  • Easy to use
  • It has a high concentration of nitrogen
  • You can use the fertilizer in any season


  • It is expensive

6. Scotts Turf Builder Southern Triple Action

The Scotts Turf Builder Southern Triple Action is another great product from the Scotts Company. As the name implies, it performs three functions and we will be highlighting these functions soon. First, if your garden is infested with ants, then you should seriously consider this product. This is because it can eliminate red ants for up to 6 months after use. Besides, the effect is not limited to ants alone as it is also effective against fleas, mole crickets, ticks and armyworms.

Also, it helps in building thick, strong lawns. This is particularly important to protect the grass or soil against hot weather conditions and drought. With this, rest assured that your grass will still maintain its green, lush look when there’s heat. Besides, it also helps to kill dollar weeds and clover that might be causing your beautiful lawn problems. However, worthy of note, this product only works on centipede grass, carpet grass, Augustine grass and zoysia grass. Outside of these mentioned grasses, expect little to no improvement.

Also, this is not an organic fertilizer. In light of this, keep pets and children off the lawn immediately after applying the product on the lawn. Finally, with this product, you can cover up to 4,000 square feet of grass.


  • Helps in eliminating weeds
  • It keeps ants away for up to 6 months
  • Helps to grow a thick lawn


  • Not safe for kids and pets

7. Dr Earth Super Natural Lawn 9-0-5 Fertilizer, 18 lb

The Dr Earth Super Natural Lawn 9-0-5 Fertilizer is one of the most impressive organic fertilizers on this list. It has an NPK combination of 9-0-5 which means it has a good balance of nitrogen and potassium. With this, your grass will look lusher and greener without leaving out the roots. In light of this, you are not only getting better-looking grass but a strong root too. Besides, with its impressive blend of fish meal, feather meal, calcium and other soil supplements, rest assured that your grass and soil will be getting the best nutrients.

Not to mention, it yields fast results and you will begin to see results within the first five days of application. Also, it controls the buildup of thatch as it systematically digests or decomposes them. With this, you will have a minimal appearance of dry grass on your lawn. Also, it is safe for kids and pets and you can have them playing on the lawn immediately after using the fertilizer. However, it is still advisable to water down the lawn after applying the fertilizer before having kids or animals on the lawn.

Furthermore, it has a slow-release formula which makes the fertilizer gradually feed your grass and soil nutrients for 3 months. Finally, it is easy to apply as it works with almost all the spreaders available.

Read more: 8 Best Fertilizer Spreaders for Your Lawn


  • Helps to reduce thatch buildup
  • It has a slow-release mechanism
  • Safe for kids and pets
  • Provides beneficial soil microbes


  • None

8. Pro Trust Products 71247 Turf 5M 15.6

Last but not the least on our list is the Pro Trust Products Turf 5M 15.6. It has an NPK number of 24-2-12 which means it is high in nitrogen and potassium with the right amount of phosphorous. Besides, its 12% potassium figure makes the root of the grass stronger. Not to mention, it is a great option for both sunny and shady lawns. Furthermore, with its water-insoluble nitrogen, rest assured that the lawn will continue to benefit from the nutrients of the fertilizer for a long time.

Besides, it works better for those that are just starting their lawn. With this fertilizer, your lawn will become full in no time. Also, it is easy to apply and it can cover up to 5,000 square feet of land. However, after applying the fertilizer, ensure you keep animals and children away from the lawn for a few hours. Besides, it is also blended with Crotonylene Diurea that helps in suppressing natural diseases that can affect the health of the soil or grass.


  • Helps to develop strong roots
  • Suitable for all types of grasses
  • It works for the long term development of the lawn


  • Not safe for pets and kids

Types Of Fertilizers For Your Grass

There are different types of fertilizers for different situations, weather and soil type. We will be highlighting all of them below.

Quick Release Fertilizers

Just like the name, quick-release fertilizers are made to provide nutrients to the soil immediately. This is particularly useful for soil with serious nutrient problems. When this is applied, changes in the lawn become visible almost immediately. Besides, you can begin to see the changes in less than 5 days. However, it is important to note that sometimes, this type of fertilizer can lead to burning of the grass. This is why the fertilizer should be used the right way the manufacturers prescribe.

Time Release Fertilizers

The time-release fertilizer works by feeding the lawn nutrients for a stipulated time frame. With this, there is a constant supply of nutrients to the soil and the plant which helps to keep the grass looking lush for a long time. With this fertilizer, all you need is a single application and the plants will continue to enjoy the nutrients till the time expires. Usually, the manufacturers of the fertilizer indicate the time frame for this.

Gradual Release Fertilizer

The gradual release fertilizer is sometimes called the ‘slow release formula’. The way it works is by slowly giving the plants the needed fertilizer at the right time. Besides, this is only possible because the nutrients don’t get drained away into the soil after application. Also, this type of fertilizer doesn’t burn the grass and it is safe to use them at any time of the year.

Starter Fertilizers

Starter fertilizers are good for growing new lawns. Often, this type of fertilizer contains a high level of phosphorous. This is because phosphorus is useful for improving the strength of roots.


Winterizer is a type of fertilizer that helps in preserving the roots of the plant while providing it with nutrients. With winterized fertilizers, the soil is assured of getting steady nutrients during winter months.

Read more: Types and Best Rooting Hormones for Propagate Plants

How do you apply lawn fertilizer?

FAQs on Lawn Fertilizers

Below are some of the frequently asked questions and answers about lawn fertilizers.

How often should you fertilize your lawn?

Answer: There are different types of fertilizers; however, applying fertilizer to your lawn twice a year is advisable.

When should I apply fertilizer to a new grass seed?

Answer: Apply the fertilizers immediately after sowing the seeds and after 4 to 6 weeks of planting the seed.

Is phosphorous fertilizer application allowed for bare spots without soil testing?

Answer: Yes it is allowed but it is recommended to test the soil before applying phosphorous

Can I mow my lawn after a fertilizer application?

Answer: No. It is advisable to wait till after 24 hours

Do I need to water in the granular fertilizer that was applied to my lawn?

Answer: Yes


We have come to the conclusion of this article on the best lawn fertilizer reviews. We are sure you learnt a lot from this article and we hope you enjoyed reading it. Importantly, we reviewed eight amazing lawn fertilizers. Each of the products that made our list was carefully selected based on the quality and positive reaction from different users. While all the products are of quality, the Miracle-Gro 1001233 Water Soluble All Purpose Plant Food takes centre stage. This is due to so many reasons but we like the fact that it is not restricted to grass or lawn alone.

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