Weed Control

What is a Weed?

Weeds are plant species that are out of place in the natural environment. They can often produce vast quantities of seed which spread across into the natural ecosystem by wind, water, birds (and other animals) and humans.

Many local bushland reserves are under threat from weeds escaping from gardens, with birds eating and spreading the seeds or from vegetation and grass clippings dumped into the bush. Weeds can take hold of an area quickly, impacting local biodiversity by smothering native plants and altering wildlife habitat.

Weed of the Season - Summer 25/26

Creeping Ruellia - Ruellia squarrosa

This sprawling, perennial herb is native to Mexico and is an emerging weed in Lane Cove. It infests natural waterways, disturbed sites and bushland boundaries. The soft leaves are covered in fine hairs, which attach to characteristic square stems, growing from a network of underground rhizomes. The delicate mauve flowers are tubular in shape, with 5 distinct petals. This weed moves readily along creek lines and is at risk of becoming heavily established within the LGA. Please notify Council should you identify an infestation of Creeping Ruellia.

Control

Creeping Ruellia is best removed by professional bush regenerators. This is because it often grows along watercourse edges, which are at risk from herbicide contamination if scraping and painting or erosion if hand weeding. If you notice this weed growing on your property along a watercourse, please contact Council for advice. For Creeping Ruellia specimens not growing along a watercourse, you can hand weed or use a trowel to dig out the underground rhizomes. You can also scrape and paint the stems using a neat glyphosate solution. Lightly scrape one side of each major stem (about 1/3rd the length of each stem) and paint immediately with herbicide. Take care when using herbicide to avoid off-target damage or contamination. Always wear PPE, follow product MSDS and never apply herbicide within 3hr of rain.

General Biosecurity Duty

All landowners or land managers have a responsibility to control weeds on their property, known as a General Biosecurity Duty. If you notice invasive weeds emerging on your property, you will need to control them as soon as possible to prevent them spreading to other properties or into bushland.

Free Advice, Resources & Native plants

Join Council’s free Backyard Habitat program to receive a garden consultation, personalised advice and native plants for your garden.

Native Look-a-like: Pastel Flower – Pseuderanthemum variabile

Differentiate Creeping Ruellia from Pastel flower by looking at flower shape. Pastel flower has small, mauve to pink coloured flowers with unequal lobes (often 2 lobed petals sitting together at the top of the flower), whilst Creeping Ruellia has a deeper mauve, tubular flower with five equal petals. Occasionally, Pastel flower leaves have a white stripe down the centre of the leaf. If in doubt, contact Council’s Backyard Habitat Officer for advice on identification and control.

Weed Legislation

Weed legislation has been reformed, with the NSW Biosecurity Act 2015 replacing the Noxious Weed Act,1993. This Act provides a statutory framework to protect the economy, environment and community from the negative impacts of pests, diseases and weeds.

Weed biosecurity includes:

preventing the entry of new weeds;
finding, containing and eradicating emerging weeds; and
minimising the impacts from weeds that cannot be eradicated.

Weeds are now divided into State, Regional and Local Priority Weeds (formerly referred to as Noxious Weeds). The Greater Sydney Regional Strategic Weed Management Plan 2023 - 2027 identifies State and Regional Priority Weeds and outcomes to demonstrate compliance with the General Biosecurity Duty. Council is a member of the Central Subnetwork Regional Weeds Committee, which coordinates a regional approach to weed management.

Weeds and their control

Priority Weeds threaten natural biological diversity, human health and property and/or agricultural productivity. Not all weeds identified as Priority Weeds are found in Lane Cove at present, but they have the potential to become serious weeds or are already serious weeds elsewhere in NSW. They are identified so that they can be eradicated or controlled as soon as they appear.

Which species are Priority Weeds?

To view the Priority Weeds list for the Lane Cove Local Government Area and how best to manage them, visit the NSW Department of Primary Industry website and select 'Lane Cove' in the priority weeds search bar.

Who is responsible for controlling Priority Weeds?

Weeds are everyone's responsibility. Together we can help minimise the harmful impacts of weeds on our environment.

Council responsibility

Under the Biosecurity Act 2015, as the Local Control Authority, Council has a legal obligation to manage the biosecurity risk posed to human health, the economy, community and the environment by weeds. Council manages weeds on Council land through its bushland management programs. Council also inspects private land to ensure land owners/managers are carrying out their obligations.

Your responsibility

All landowners or land managers have a responsibility to control Priority Weeds on their property, known as a General Biosecurity Duty. If you notice invasive weeds coming up on your property, you will need to control them as soon as possible to prevent them spreading to other properties or into bushland.

Identifying and Managing Weeds

How can I identify weeds?

View the Common Weeds of Lane Cove for some identification and removal tips.

Other useful websites to help you identify a weed species:

Sydney Weeds

NSW Weedwise - Department of Primary Industry

Australian Government Weed Identification Tool

Council staff can also help to identify weeds and provide advice on weed removal. For assistance or to report weeds, please contact Council on 9911 3555. You may also present weed samples at Council's Customer Service Centre for identification.

Council's Backyard Habitat Program is a free program for residents providing guidance on creating native habitat gardens, including the identification and advice on weeds and their removal.

My neighbour has weeds - what can I do?

The quickest and most effective way of dealing with weed issues on your neighbours' property is to foster good relations with your neighbour and seek to resolve the issues together. If this is not possible, contact Council and an authorised officer will inspect the property to assess whether the plant has legislative requirements to be controlled under the NSW Biosecurity Act 2015. If so, Council can proceed with the matter.

If there are no legislative requirements but the officer deems the plant poses a significant biosecurity risk that can be reasonably and practicably addressed, then the matter can also be taken further. If this is not the case and you still can't resolve the issue with your neighbour, contact NSW Community Justice Centre for free advice and mediation. Taking a neighbour to court should always be a last resort.

If issues between neighbours cannot be resolved through direct engagement or mediation, another avenue is the legislation, Trees (Disputes between neighbours) Act 2006 and its Regulations. This Act sets out the circumstances where the Act applies and provides possible actions. The regulations state that for the purposes of the Act that Bamboo and any plant that is a vine are defined as trees.

Can I get help controlling weeds on my property?

Council Officers can provide information and advice on how to control weeds, however we are unable to undertake works directly on your property. The Australian Association of Bush Regenerators has a list of professional bush regenerators who may be able to help you, or check local newspapers for garden maintenance businesses.

For frail and older people, carers, and people with a disability, Easy Care Gardening provides a subsidised gardening service within the area by teams of willing volunteers.