NPK - What does it mean? Why is it important for your lawn? - Lawn Solutions Australia

NPK – What does it mean? Why is it important for your lawn?

Knowing why NPK is important for your lawn will help you to understand how you are helping your lawn when you fertilise.

For the most part though, as long you use a good quality fertiliser that is suited for your turf variety – where all the scientific work has been done for you, your lawn will thrive.

Lawn Fertilisers come in many varying types and blends and can be quite confusing as to which is the right option for you. Grass is like any other plant – It takes in nutrients and air through the soil and sunlight through the leaves for photosynthesis where the conversion to sugars and energy takes place. It is the job of lawn fertilisers to keep this in balance and help provide the nutrients that your lawn is lacking.

The three numbers on the side of your fertiliser represent the value of the three macro-nutrients required for your lawn.

These three macro-nutrients are N, P, & K.

Let’s break it down…

(N) Nitrogen – Nitrogen is largely responsible for the growth of leaves on the plant and is the most talked about nutrient when it comes to lawns and is usually the highest percentage of your NPK ratio. Nitrogen usually comes in the following forms: Ammonium, Controlled release (synthetic) and Urea.

Lawns love Nitrogen, but it is important to strike a balance between strong leaf growth and strong roots capable of supporting it as well. Which is where Phosphorus comes in.

(P) Phosphorus – Phosphorus is largely responsible for root growth and is actually quite a low percentage of the overall NPK ratio. Phosphorus moves slowly through the soil, and isn’t used in great amounts by your lawn, so some is needed but not a great amount.

Phosphorus usually comes in the following forms: Water Soluble, Citrate Soluble and Citrate Insoluble.

(K) Potassium – Potassium is a nutrient that helps the overall functions of the plant perform correctly. Potassium is an essential macro-nutrient used in the largest quantities by plants for vigour and growth. Potassium comes in the form of Sulphate as soluble potash which helps grass withstand drought and disease. It also helps the plant to more efficiently use Nitrogen.

By understanding how these nutrients effect the overall health of your lawn, you will be better equipped to identify deficiencies in your lawn and the tell-tale signs of stress, which will help you know when it’s a good time to fertilise.

Lawn Solutions Fertiliser was developed for use on Sir Walter DNA Certified Soft Leaf Buffalo lawns, but it will work equally well on other lawn varieties, such as Couch, Buffalo, Kikuyu, Zoysia, Tall Fescue, Bluegrass and Ryegrass, delivering all the nutrients the turf needs to recover and grow.

Visit the Lawn Solutions Australia website where you can buy Lawn Solutions Fertiliser on the Lawn Store.

Buy lawn care products


Lawn Solutions Hand Held Spreader

Ideal for spreading fertiliser, Lawn Seed & Weed control products. Convenient flow adjustment, 3L Capacity.

Acelepryn GR

ACELEPRYN GR sets a new standard in long lasting, efficient control of turf pests. Covers up to 1000m2 and lasts for up to 5 months.

Husqvarna Automower 315X-LINE

The Husqvarna Automower® 315X-LINE