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Park-style bench sitting at the edge of a front yard


Taking the time to weed your lawn will make a huge difference in the long run, and it has the added bonus of encouraging a beautifully healthy garden. Which weed killer you use will depend on the severity of your weeds and the time of year, so make sure you choose the right one.


1Gather your tools and materials

Below you'll find all the tools and materials you'll need to complete this project.

2Identify the weeds

Have a closer look at the weeds in your grass. If you're not able to identify what weeds are invading your turf, take a picture and bring it into your local Bunnings garden department. We can help you identify which weeds you have and offer advice on to how to tackle them.

A person examining a weed in a lawn

3Select the weed killer that's right for your situation

You'll have a choice of three types of weed killer.

a) A pre-emergent weed killer that targets weeds before they've had the chance to germinate. This type of weed control is best done in autumn or winter, depending on the weed you're trying to control.

b) Selective weed killers that don't harm most varieties of grass in fact, some of them will feed your lawn while killing the weeds. This is typically best in springtime as weeds would have already sprung but this type of herbicide is safe for some grasses. Simply attach to the hose and spray your lawn according to the instructions on the pack.

c) Non-selective weed killers won't be fussy about what they kill. They will destroy pretty much any plant life that they come in contact with, including your lawn and shrubs. This makes them incredibly strong and effective for tough weeds but also means you have to be extra careful when you apply. If this is the type of weed killer you're choosing to use, you may like to use a sprayer with a cone to make applying the herbicide easier and more precise.

d) For organic gardening, vinegar can function as a natural weed killer. Check out our range of organic and naturally derived herbicides available, too.

Manual weed removal is also an option. Using a weeding tool, make sure you pull out the entire weed, including the roots. Place the weed directly into a bucket so it won't spread to other parts of your grass.

Finally, you can also pour boiling water on your weeds to kill them off. Take care when pouring the boiling water to ensure it doesn't make contact with your skin or splash back.

A person kneeling on the grass with three different types of weed killers

4Apply your weed killer

After choosing the best weed killer for your lawn, you'll need to apply it correctly to achieve effective results.

  • It's best not to apply the herbicide if it's windy or if the forecast says it's going to rain in the next 24 hours. Rain will either dilute your weed killer or cause it to spread to areas you didn't want it.
  • Before you apply, you should make sure that any pets or children are out of harm's way and can't get back onto the grass before it's safe again.
  • Apply the weed killer as the weed killer label instructs. Some chemicals may require the user to wear PPE, such as safety glasses, gloves and a dust mask.
  • Some weed killers may require a couple of applications before they get rid of all your weeds. Herbicides will be more effective when your plants are actively growing.
A person using a fertiliser spreader to spread weed killer on a lawn

5Maintain your lawn

A well-maintained, actively growing lawn is the best defence against weed growth. To promote good lawn growth, don't mow your grass too low, compact the soil or deprive it of water. This will reduce the amount of weeds growing and spreading.

A healthy lawn next to a garden covered with mulch separated with garden edging

6Don't stop there!

Once you rid your lawn of weeds, it's time to mow the grass and trim the edges!

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. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.