Best Fertilizer for Ryegrass 2023 – Review and Buying Guide

With ryegrass, you’ll want to ensure that it grows correctly. While you can grow it naturally, you’ll achieve better results with the help of a fertilizer. Fertilizers help ryegrass by helping the seeds grow faster, especially during cold climates. 

But where can you find the best fertilizer for ryegrass? This guide will give you clear insights into the best ryegrass fertilizers in the market. We’ll judge them based on their pros and cons so you can see which one works best for you.  

If you’re still confused about what to buy, we’ve created a buying guide to help you. And if you’re still stuck, the F.A.Q. Section will help answer common questions you might have. By the end, you’ll have the confidence to get a fertilizer worth your money. 

List of the Best Fertilizer for Ryegrass Reviews

Scotts Turf Builder Thick’R Lawn Sun and Shade

The Scotts Turf Builder Thick’R Lawn Sun and Shade is the best fertilizer for ryegrass. It features a 3-in-1 solution (fertilizer, soil improver, and seed) to help improve the quality and lifespan of your ryegrass. Get this if you want a simple yet effective solution for your lawn. 

In one application, users can expect to see a 50% increase in lawn thickness. This fertilizer is intended for an entire lawn, and you can apply it with the help of a Scotts spreader. With its seeds, you can fix the gaps in your lawn, allowing for more ryegrass to grow. 

Before applying this fertilizer, check the dimensions of your lawn. You might need an extra pack if you have a lawn that’s over 15,000 squ. ft. Once you have enough of the fertilizer, you can start spreading it across the lawn in areas that need the most growth.

On average, it will take approximately two weeks before you’ll notice any results. When applying, rake approximately 0.25 inches of enriched soil on the lawn. Don’t try to overseed it, or else you’ll run the risk of killing your grass. 

Overall, the Scotts Turf Builder Thick’R Lawn is great if you have ryegrass on your lawn. Simply place it on your lawn between 60°F and 80°F to achieve optimal results. You’ll have a powerful tool for keeping your garden in good condition. 


  • 50% Thicker Lawn
  • 3-in-1 Solution
  • Spread evenly on ryegrass


  • Slow grass growth
  • Limited germination results

Amaze! Lawn Food

Next on our list is the Amaze! Lawn Food. This ryegrass fertilizer features over 5,000 squ. ft of lawn coverage, making it a good option for small-medium-sized lawns. Thus, giving you enough coverage to beautify your lawn with ease. 

This is a versatile product, as it’s not limited to just ryegrass. The Amaze! Lawn Food can be used for Zoysia, St. Augustine, Kentucky Bluegrass, and Fescue grass, giving your more opportunities to improve your lawn soil. So consider getting this if you want an effective source of plant fertilizer that works on virtually any grassland. 

When using the Amaze! Lawn Food, start by applying the fertilizer when the grass is growing. Set your spreader dial to a 3 ½ to ensure that it spreads evenly once you apply it. After feeding your ryegrass and giving it water, keep everyone off the lawn until the grass and soil is completely dry. 

After applying the Amaze! Lawn Food will remain on your lawn for up to 3 months. This gives your plants enough time to grow and remain well-fed. Make sure to feed your plants every eight weeks to achieve the best results. 

Basically, the Amaze! Lawn Food is a great choice for those wanting to keep their plants alive and healthy. It can be used to protect your plants against drought and heat, giving them an extra layer of safety. 


  • Protects your lawn from heat
  • Prevents premature grass browning
  • Direct application


  • Doesn’t have iron content
  • Difficult to spread

Liquid Lawn Fertilizer, 3-18-18 NPK Grass Fertilizer

The Liquid Lawn Fertilizer ranks #3 on our list. It has a 3-18-18 ratio, meaning that it has 3% Nitrogen, 18% Phosphorus, and 18% Potassium, giving you enough chemicals needed to grow your garden. Thus, making it a good choice for those wanting their ryegrass to stay in good condition. 

Why is the NPK ratio so powerful? Nitrogen is used to help with the growth of turf blades and leaves. Meanwhile, the Phosphorus helps with flower development and root growth. With Potassium, it balances the plant’s performance. Thus, giving you a fertilizer that has functionality and utility. 

Users like the Liquid Lawn Fertilizer because it’s easy to apply. It is made to give your grass long-term nutrients within the turf and root system. So, you’ll keep your plants well fed and equipped for survival. 

When using the Liquid Lawn Fertilizer, you should make sure your lawn has a consistent watering schedule. Don’t apply your fertilizer during the heat of the day or lawn. And when mowing your lawn, wait 24 hours until the fertilizer settles in. 

Mainly, the Liquid Lawn Fertilizer is a great tool for the cultivation of your ryegrass. This is useful for commercial-grade applications and lawns. So, get this fertilizer if you want the best results possible. 


  • Low Salt Index
  • Easy to Use
  • Quick Absorption


  • Not effective in germinated grass
  • Non-biodegradable plastic packaging

Southern Ag All Purpose Granular Fertilizer  

Fourth on our list is the Southern Ag All Purpose Granular Fertilizer. This fertilizer has a 10 (Nitrogen) – 10 (Phosphorous) – 10 (Potassium) ratio, which keeps your garden in shape. By using this product, it will make your grass grow exponentially. 

The fertilizer has a granular formation, meaning that it can spread evenly throughout the garden. When using this product, make sure that the grass is clean to get the best results. This means that you can keep your grass in a state of constant growth after you’ve applied the fertilizer on your lawn. 

However, some users did not like the product’s lack of consistency. When applying the fertilizer on the grass, it can lead to browning if you’re not careful. To solve this problem, make sure that your grass has time to rest before overly applying it on your lawn. 

Since it has 5lb fertilizer, it is enough to cover a 2,500 ft lawn. This means that you’ll have enough fertilizer for small lawns, so you might need an extra bag if you have more land. 

Mainly, you should get the Southern Ag All Purpose Granular Fertilizer for a quick lawn makeover. Apply it lightly to ensure that it doesn’t damage your lawn’s grass. By doing this, you’ll have an effective fertilizer that can keep your ryegrass growing strong. 


  • Balanced NPK Ratio
  • Revives Trees and Plants
  • Can grow seed potatoes


  • Inconsistent results 
  • Not suitable for potted plants

Pennington Smart Seed Perennial Ryegrass 

The Pennington Smart Seed Perennial Ryegrass ranks #5 on our list. This 3 lb fertilizer has enough to cover 750 sq. ft of grass. Thus, you can use this for small patches of land that need quick revitalization. 

You should use the Pennington Smart Seed Perennial Ryegrass in areas that have 4-6 hours of sunlight. Users can expect to see noticeable results within 8-14 days. This fertilizer is excellent for temporary warm and permanent cool-season lawns, making it useful throughout the year. 

This product allows you to store grass seed for two years after its test date. Make sure that you keep it in a dry and cool area. Since it uses less than 30% of water, it’s easier to help your grass grow to its optimal size. 

On the other hand, the product doesn’t give a deep grass result all the time. Instead, it would have a light green appearance, which could throw a few users off. So don’t expect the grass coloring to look as advertised. 

For ryegrass owners, you should consider getting the Pennington Smart Seed Perennial Ryegrass. It creates a fine-bladed lawn and keeps your plants healthy. So consider getting this if you want to have a simple fertilizer to improve your ryegrass. 


  • 2 Weeks to See Results
  • 30% Less Water
  • Good for small lawns


  • Poor germination
  • Lack of grass color

Buying Guide

Now that you know the best fertilizer for ryegrass available, it’s important to know the mechanics behind buying one. Doing so will help you make a calculated decision when getting a fertilizer for your ryegrass lawn. 

Product Usability

The usability of your ryegrass fertilizer product will depend on what the manufacturer offers you. For instance, a fertilizer that’s easy to use is better for beginners because they don’t have to spend too much time reapplying it on their lawn. Thus, always try to find a ryegrass fertilizer with simple instructions to ensure you can use it properly the first time. 


Biofertilizers can be applied to the ryegrass’ soil, leaves, or crops and have microorganisms built in it. They aid in the ryegrass’ nutrient management. Each of the microorganisms plays an essential role in the wellness of your lawn. 

Fertilizer Elements

  • Nitrogen

Nitrogen is an important component of ryegrass growth. It helps promote chlorophyll, which aids in creating green grass and is used to conduct photosynthesis. Plus, it aids in protecting your grass from dangerous pathogens. If your ryegrass doesn’t have sufficient nitrogen, it will have a faded color and grow slowly. 

  • Potassium: 

Potassium helps in keeping your grass regulated and strong. When used, Potassium impacts the cell membranes’ water pressure and helps the metabolic process. In stressful environments, Potassium keeps the grass strong and in good condition. 

It protects the ryegrass from dangerous elements such as insect infestations illness. And it improves the dry and winter tolerance for your grass.     

  • Phosphorous

Phosphorous is used to give sustenance to your plants. And it is useful for metabolic activities such as energy transport, degradation, carbohydrate production, and photosynthesis. Since it aids in plant growth, phosphorous helps your ryegrass grow dense and long. Grass that’s lacking in phosphorous will experience limited growth.


To conclude, there is a multitude of ryegrass fertilizers to choose from. Try the Scotts Turf Builder Thick’R Lawn Sun and Shade if you want an all-purpose ryegrass fertilizer. Check out the Amaze! Lawn Food if you need a fertilizer that has more versatility. Purchase the Liquid Lawn Fertilizer, 3-18-18 NPK Grass Fertilizer if you need a liquid fertilizer. No matter which one you choose, you’ll have a healthy and strong ryegrass lawn as a reward.


When Should I Apply Ryegrass Fertilizer?

Usually, people plant ryegrass in the fall season. This happens because this allows the ryegrass to grow and have a green appearance during the winter. In addition, ryegrass needs a mixture of macro and micro minerals to ensure the fertilizer remains potent and grows within a limited time. 

How Much Can Ryegrass Fertilizer Be Applied Per Acre?

On average, your lawn will need 50-70lb of ryegrass for each acre of land. However, this number can change based on the seeding measurements and the type of companions on your lawn. 

You can spread approximately 1- 1.5 million seeds for each acre. So you’ll be able to seed about 35-45lbs of seed during early November. 

Should I Get a Fast Release or Slow Release Fertilizer?

The answer depends on the quality of your lawn and the needs of your ryegrass. For instance, you don’t want to apply a fast-release fertilizer during the summer, as it will lead to overgrowth. 

A slow-release fertilizer will provide a sufficient amount of nutrition over time. However, fast-release fertilizer is more acceptable as it quickly integrates into the soil and provides the vitamins needed for growth. 

You should use a fast-release fertilizer during the fall season. This will help your grass continue to grow during the winter season. If your grass is still in the growth phase, you should apply a slow-release fertilizer.  

Fast-release fertilizers will make your food usable within two weeks. The nutrition will remain accessible for around two months with slow-release fertilizers with slow-release fertilizers. Make sure you check your ryegrass throughout the seasons to see which fertilizer will work the best for it. 

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