Ultimate Guide to Choosing Weed Killers for Lawns

For Australian homeowners, maintaining a pristine lawn involves more than just regular mowing and watering—dealing with weeds is a crucial part of the care regimen. Choosing the best weed killer for lawns can be daunting, given the myriad of options available. 

This comprehensive guide is designed to help you select the best lawn weed killer for your lawn, ensuring your grass stays healthy and attractive without harming the environment or the turf itself.

Understanding Types of Lawn Grass Weed Killers

Before you can choose the best lawn weed killer, it’s important to understand the different types available and how they work:

Selective Weed Killers

These are formulated to target specific types of weeds without damaging the grass, essentially making them lawn safe weed killers. Products like the Bow and Arrow Weed Killer Herbicide are designed to eliminate common broadleaf weeds such as bindii and clover, making them ideal for preserving your lawn while removing unwanted plants.

Non-Selective Weed Killers

These products kill virtually all plants they come into contact with and are best used for clearing areas where you plan to start anew. Care must be taken to avoid contact with desired plants.

Pre-Emergent Weed Killers

These are applied before the weeds germinate. They are particularly effective in preventing annual weeds by creating a chemical barrier in the soil that stops the development of weeds early in their growth cycle. The OxStar Lawn Fertiliser & Weed Preventer offers this type of protection, preventing the emergence of weeds like Winter Grass and Summer Grass while fertilising your lawn.

Post-Emergent Weed Killers

Used on weeds that are actively growing and visible above the soil. Products like Tempra Nutgrass Killer are formulated to tackle these types of weeds without harming your turf.

Choosing the Right Weed Killer for Your Lawn

When selecting a weed killer, consider the following factors to ensure you choose the right one for your needs:

Identify Your Weeds

Knowing what type of weeds you’re dealing with is the first step. Broadleaf weeds require different treatments compared to grassy weeds. For broadleaf weed control, products like Bow and Arrow are highly effective.

Understand Your Grass Type

Not all weed killers are suitable for all grass types. It’s vital to choose a product that is safe for the type of grass in your lawn. For example, the Lawn Treatment Pack – Bumper, Bow & Arrow, Tempra is safe for Zoysia, Buffalo, and Couch, making it a versatile choice for many Australian lawns.

Consider the Lawn Size

The size of your lawn will determine how much product you need. Products are typically available in various sizes to cover different areas. For larger areas, prevention packs like the Lawn Grub and Weed Prevention Pack 500 provide a comprehensive solution that covers up to 500 m².


Many homeowners prefer using products that are environmentally friendly. Look for weed killers that offer effective control without the harsh chemicals that can harm the environment and local wildlife.

Best Practices for Applying Weed Killers

Applying weed killers effectively is crucial for achieving the desired results without damaging your lawn or the environment. Here are detailed best practices to ensure safe and effective application:

Read Instructions Carefully

Every weed killer comes with specific guidelines that need to be meticulously followed. These instructions cover everything from the amount of product to use (application rates) to the optimal times for application (timing). This can include advice on how long before or after rain application should occur, how often to reapply, and what temperatures are most effective for application. 

Following these directions helps ensure that the herbicide works as intended without harming your grass or causing unnecessary environmental damage.

Apply Under the Right Weather Conditions

The effectiveness of a weed killer can be greatly affected by the weather conditions at the time of application. It is crucial to apply herbicides in calm weather to prevent drift that can harm nearby desirable plants. 

Additionally, avoid application during rainy or wet conditions unless the product is specifically designed for wet weather. This prevents runoff that can lead to pollution and a reduction in the product’s effectiveness. Similarly, very hot conditions might cause the product to evaporate too quickly, reducing its efficacy.

Use Protective Gear

Safety is paramount when handling and applying chemical weed killers. Personal protective equipment (PPE) is essential to protect your skin, eyes, and respiratory system from potentially harmful chemicals. At a minimum, wear gloves and protective eyewear. Depending on the toxicity of the herbicide, you may also need to wear a respirator, especially in areas with poor ventilation. 

Long sleeves and trousers can further protect your skin from splashes. Always wash your hands and other exposed skin thoroughly after handling herbicides, even if you have worn gloves.

Following these best practices not only enhances the effectiveness of the weed killers but also ensures that you are applying them in a way that is safe for both you and the environment.

Australian Lawn Concepts: Your Partner in Lawn Care

At Australian Lawn Concepts, we are dedicated to helping Australian homeowners achieve and maintain beautiful lawns. As a leading supplier of turf and lawn care products in Australia, we offer a range of high-quality products tailored to the unique challenges of lawn maintenance in various Australian climates.

Whether you need advice on the best weed killer for your specific lawn conditions or are looking for professional services to design and install your landscaping projects, our team is here to help. With our expertise in turf installation and maintenance, Australian Lawn Concepts is your go-to source for all your lawn care needs.

Visit our website today to explore our products and learn more about how we can assist you in achieving the perfect lawn. Let us help you select the right weed killer and provide you with the tools and knowledge to keep your outdoor spaces looking their best.