How to fertilise your lawn

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Keep your lawn as healthy as possible with a bi-annual application of fertiliser.

Tools and materials

Cyclone Invisigrip Tough Gardening Gloves

Eye protection

Hortico 15kg Organic Lawn Fertiliser

Scotts Lawn Builder Easy Green Broadcast Fertiliser Spreader

Scotts Lawn Builder 4kg Wetting Agent Fertiliser

Seasol 2.5L Super Soil Wetter and Conditioner

Seasol 2 x 2L Ready To Use Lawn Fertiliser – Twin Pack

Yates 2L Buffalo Pro Hose On Lawn Fertiliser

Fertilsing is an essential part of lawn maintenance, encouraging growth and healthy grass all year long. We suggest doing it twice a year – once in the autumn months to protect it throughout the winter and once in spring to help boost the growth and carry you through the summer months.

The first thing you need to do is work out what type of lawn you have, as this will make a difference with which products you use. Common types of grass include Kikuyu, Tall Fescue, Couch and Buffalo.

lawn fertiliser products

1. Choose from chemical or organic lawn care

There are two types of lawn care – chemical and organic. A chemical lawn builder gets instant growth and helps green up your lawn while organic fertilisers are eco-friendly and help with your soil’s overall health.

There are also two types of application – liquid and pellets. Liquid tends to absorb quickly, whereas the pellets break down over a period of time. Using one over the other depends on what type of gardener you are – pellets allow you to sit back and let the process happen, meaning a more hands-off approach. Liquid does require a little more regular maintenance but delivers quick results.

It’s also important to check if your ground is hydrophobic before choosing your fertiliser. The best way to check is to see what water does when applied – if it is hydrophobic, the water will pool on the surface or run completely off. You may need to use a wetting agent on your grass, prior to fertilising, if this is the case.

woman next to lawn fertiliser products

2. Use a lawn spreader to evenly distribute your fertiliser

When using fertiliser, use a lawn spreader so you get a nice even coverage. First, pop on your gardening gloves. Then, adjust the spreader setting as indicated on the back of the pack and in line with the size of your lawn. Fill the tray with fertiliser and then walk at a steady pace, turning the handle as you go so it evenly spreads it over your lawn.

using lawn spreader to fertilise lawn

3. Water in the fertiliser using tonic

After you have distributed the fertiliser, it’s a good idea to water it in. Use a tonic or concentrate with your water. Just clip the bottle to the end of your hose and you’re ready to go!

watering in the fertiliser


If you’re using pellets, fertilise your lawn every 3–4 months. If you’re using a liquid, it’s every 1–2 months. If you’re unsure, check the back of the packaging of the product you’re using – it will have a guide.

Get your lawn growing

Keep your lawn looking fresh with our guides to lawn maintenance, including mowing, trimming and weeding.

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Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.
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