The Best Lawn Fertiliser for Kikuyu, Couch, and Buffalo Grass

Lawn fertiliser provides nutrients that are necessary to keep your lawn looking green and to promote plenty of fresh growth.

To get your lawn looking its best, it’s important to select the best lawn fertiliser for the type of grass that you’re growing.

In general, you want a fertiliser that’s relatively high in nitrogen to promote strong growth and keep your lawn lush and green.

What is lawn fertiliser?

Lawn fertiliser is a special blend of nutrients that are necessary to keep your lawn looking green and to promote plenty of fresh growth.

Lawn fertiliser is available in both granular and liquid forms and in a variety of different formulations.

In general, granular fertilisers work over time as they are absorbed into the soil while liquid fertilisers are more fast-acting and will give you quicker results.

Types of fertilisers

Lawn Fertilizer | Lawn care

There are basically five different types of lawn fertilisers that act in different ways when applied to your lawn.

Granular fertilisers

Granular fertilisers are spread over your lawn either by hand or by using a fertiliser spreader.

They are easy to apply and will provide your lawn with valuable nutrients as soon as they’re absorbed into the soil.

Liquid fertilisers

The most common types of liquid fertilisers for lawns are the weed and feed varieties.

WeednFeed | Lawn care
Yates Weed’n’Feed products

Not only do these fertilisers supply valuable nutrients to your grass but they also help to eradicate many types of broadleaf weeds

These fertilisers are applied with water. Many will have an attachment to which you can connect a garden hose but they can also be diluted with water in a watering can if you only have a small lawn.

Slow-release fertilisers

These types of fertilisers usually come in a granular or pelleted form and are designed to release their nutrients slowly as the grass needs them.

They will continue to release nutrients over a period of time until the pellet contains no more nutrients.

Controlled-release fertilisers

These fertilisers work in a similar way to slow-release fertilisers except that the release of nutrients is controlled by the temperature and moisture level in the soil.

Therefore, once the soil warms up, nutrients are released to the roots of the grass.

This controlled release means that your lawn gets the nutrients when it needs them most and reduces the risk of fertiliser burn that can happen when too many nutrients are added to your lawn at once.

Organic fertilisers

Organic fertilisers such as Dynamic lifter and blood and bone are often used to condition the soil as well as supply nutrients to the grass. 

Lawn fertiliser ingredients

The three main ingredients in lawn fertiliser are nitrogen, phosphorus, and potassium.

These are the essential macronutrients that your lawn needs to grow lush and green.

Lawn Fertilizer 4 | Lawn care

Essentially, you want a fertiliser that is high in nitrogen and has smaller amounts of phosphorus and potassium.

The nitrogen is what helps to keep your lawn nice and green while the phosphorus and potassium promote strong root growth and keep your lawn healthy.

The best lawn fertiliser for Kikuyu grass

Kikuyu requires a fertiliser that is high in nitrogen in order to keep its lush green colour.

A slow-release fertiliser is ideal for this grass variety.

Some examples of good lawn fertilisers for Kikuyu include:

  • Yates Buffalo Pro
  • Scotts Lawn Builder All Purpose Slow-release 

The best lawn fertiliser for Couch grass

Couch responds really well to high nitrogen fertilisers. Especially when they’re applied during the active growing season.

Some examples include:

  • Richgro All-Purpose
  • Yates Buffalo Pro

The best fertiliser for Buffalo Lawn

Buffalo grass responds well to a fertiliser that has additional iron added. The extra iron will help your lawn to maintain its rich dark green colour.

Here are some examples:

  • Amgrow 55014 Buffalo Lawn Food
  • Scotts Lawn Builder Buffalo Slow-Release
  • Hortico Buffalo Lawn Fertiliser

Should you use a high nitrogen fertiliser?

Lawn Fertilizer 3 | Lawn care
Nitrogen makes grass greener by stimulating the production of chlorophyll. 

Although your lawn needs nitrogen to grow lush and green, you do need to understand that it can only use a certain amount at any given time. Especially at different times of the year.

During spring and summer, while your lawn is actively growing, it will need a high nitrogen fertiliser to help facilitate all that growth. But, it’s also important to stick to the recommended quantities for the fertiliser that you’re using. 

If you add too much nitrogen, not only can it burn your grass but the excess will eventually leach out of the soil and end up in local waterways. This is not good for the natural environment.

As the weather starts to cool down in autumn, your lawn will not need as much nitrogen because its growth rate will slow down.

The same applies in winter. In fact, most Australian lawns are relatively dormant in winter and don’t need any nitrogen at all.

It’s also important to note that a healthy lawn also requires other macronutrients such as phosphorus and potassium. These are vitally necessary for strong root growth and healthy grass.

Lawn fertiliser FAQ

What chemical makes grass green?

Nitrogen is a nutrient that will make your grass green. This is because it stimulates the production of chlorophyll in the blades of grass. 

How can you thicken kikuyu grass?

To thicken your kikuyu grass, make sure that you cut it often and quite low during rainy months. In hot, dry weather, let the grass grow a little taller and mow it less often. Collect the clippings and don’t leave them on the lawn. 

How can you make kikuyu grass grow faster?

Apply a slow-release fertiliser during the warmer months to encourage your kikuyu to grow faster.

Can you over fertilise a lawn?

Yes, it’s possible to over-fertilise your lawn. If you apply too much fertiliser, the salt levels in the soil will increase and this can damage the grass.

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Annette Hird

Annette Hird is a gardening expert with many years of experience in a range of gardening related positions. She has an Associate Diploma of Applied Science in Horticulture and has worked in a variety of production nurseries, primarily as a propagator. She has also been responsible for a large homestead garden that included lawn care, fruit trees, roses and many other ornamental plants. More recently, Annette has concentrated on improving the garden landscape of the homes that she has lived in and focused a lot of energy on growing edible plants as well. She now enjoys sharing her experience and knowledge with others by writing articles about all facets of gardening and growing plants.


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