Managing weeds

Plan to succeed

Before starting weed control, it’s important to be clear about your goals, whether that’s protecting native plants, keeping waterways clear, protecting crops, or meeting legal requirements.

Set realistic expectations by making a plan that considers:

• How much time and money you can commit each year
• The follow-up work needed to manage regrowth and new weeds
• Whether you’ll hire professional help for difficult jobs
• Opportunities to work with neighbours on shared weed issues
• What will replace weeds after removal to prevent bare ground
• How to manage any concerns about herbicide use

Identify and map your weeds

Knowing how to identify your weeds is key to choosing the right control methods and timing. Use online tools like Weedscan, iNaturalist, or Pl@ntNet, ask local experts, or get help from a Stewardship Officer or community groups.

Once identified, map your weeds across your property. Mark important features like creeklines, native vegetation, dams, fences, and tracks,these help you prioritise and plan where to focus your efforts.

Create management zones and note weed locations, sizes, and whether they’re dense or scattered. The more detailed your map, the easier it is to target weed control effectively.

Online weed identification tools

• Weedscan
• Atlas of living Australia
• iNaturalist
• Pl@ntNet
• Google Lens
• Facebook groups – such as SA Natureteers

Choose your weed management strategy

Effective weed control means using the right tactics for your situation. Whether you’re dealing with new weeds, established infestations, or protecting important areas, focusing your efforts will help you make the most impact.

• Eradication: Act fast to remove small or new infestations before they spread. Early control is usually simpler and less costly.
• Containment: Manage larger infestations by tackling scattered plants and less-affected zones first, then working inward to shrink the main weed patch.
• Asset protection: Focus on protecting high-value areas like native vegetation, waterways, fences, and grazing land to safeguard key resources and infrastructure.

Additional important points to consider include:

• Controlling weeds in watercourses: Managing weeds near creeks, rivers, and wetlands requires care to avoid damaging the waterway or causing erosion. Always check if permits are needed and seek advice before using heavy machinery or clearing large plants near water.
• Dealing with erosion: After removing weeds, bare soil can quickly erode and invite new weed growth. It’s important to stabilise the soil by planting grasses, shrubs, or native species as soon as possible to protect the area and prevent further problems.
• Soil testing: Knowing the condition of your soil can help you choose the best plants and management methods. Testing for nutrients and soil health will improve the success of your weed control and revegetation efforts.
• Working with neighbours: Weeds don’t respect property boundaries, so collaborating with neighbours or local groups can improve results. Sharing knowledge, resources, and coordinating control efforts helps manage weeds more effectively across the landscape.

Choose the right control method

There’s often more than one way to control weeds and the best results usually come from using a mix of methods. The technique you choose should effectively kill the weed, protect nearby plants, suit your skills and budget, and be something you can realistically maintain over time.

Your choice of method may also depend on the site conditions, whether it’s flat, steep, rocky, near water, or a sensitive bushland area and the type of weed you’re tackling.

Integrated weed management brings together different methods in a planned way. For example, you might slash a weed patch, let it regrow, then spray the fresh growth and hand-pull any seedlings. This approach can reduce herbicide use and improve results over time.

Common weed control methods include:

• Biological control: Using approved natural enemies like insects to suppress certain weeds. Works best as part of an integrated strategy.
• Manual control: Hand-pulling, hoeing, or solarising small patches, especially for new infestations or in sensitive areas.
• Mechanical control: Slashing, mulching, or deadheading weeds to prevent seeding or to manage large areas.
• Herbicide use: Always follow label directions and take care near water, crops, or sensitive plants.
• Fire as a tool: Burning can trigger seed germination for follow-up control or support natural regeneration — but should be planned carefully with permits and advice.
• Preventing spread: Clean machinery, use weed-free materials, and encourage groundcover to stop new weeds establishing.

Follow-up, monitor, maintain and review

Weeds won’t disappear after a single effort, regular follow-up and maintenance are key to long-term success.

Stay on top of:

• Monitoring regrowth: check sites regularly and act before weeds take hold again
• Adjusting your methods: review your plan, change tactics if needed, and learn from each season
• Photopoints: track progress with before-and-after photos to keep motivated and measure success

Always plan to replace weeds: 

• Weeds love bare ground. Replace them with pasture, native plants, or revegetation to stop them coming back.

Work with neighbours and protect key areas

• Keep fences and boundaries clear
• Watch for weeds in watercourses, wetlands and bushland
• Share the load with neighbours or local groups

Prevention matters: A few simple steps can help stop new weeds arriving:

• Clean equipment and vehicles
• Check stock feed for weeds
• Contain new livestock before release
• Keep an eye out for weedy garden plants