Register to join the Arum Lily Blitz

Arum lily is the most widespread, damaging weed in the Margaret River region. It is a biological bulldozer ploughing through our beautiful native vegetation outcompeting diverse and unique understorey, replacing it with a weed monoculture. Along with a huge loss of native plants, it reduces the value of native vegetation for insects, reptiles, birds and mammals.

Arum lily is an incredibly successful weed in our region, and without control would continue to spread across the landscape. But we are taking action, and with local and state government agencies and many hundreds of landholders and volunteers, have taken a stand against this invasive weed.

Backed by funding from the Western Australian Government’s State NRM Program, Nature Conservation Margaret River Region has spearheaded the biggest arum lily control program this region has ever seen.  In the first three years of the Arum Lily Blitz an impressive 1,378 landowners took part, actively controlling arum lilies across over 17,000 hectares. Over 3,867 hours of spraying was undertaken by contractors on private property, National Parks and reserves. Private landowners themselves completed over 3,421 hours of control.

Volunteers from the Yallingup Land Conservation District Committee and the Friends of the Cape to Cape Track sprayed arum lilies within the Leeuwin-Naturaliste National Park, completing an incredible 642 volunteer hours of hard work.

The Department of Biodiversity, Conservation and Attractions (DBCA) working in priority sites in the National Park completed 323 hours of control. The Shire of Augusta Margaret River, City of Busselton and Margaret River Busselton Tourism Association also made a valuable contribution with 1,118 hours of control undertaken.

In 2021 Nature Conservation also received funding to work in partnership with the DBCA to control arum lily in the Leeuwin-Naturaliste National Park. Over $60,000 has been allocated to tackle many infestations across the Park in 2021 and 2022 including following up and extending previous areas of control and also beginning work in the karri forest at Boranup. The funding has come from the Government of Western Australia’s Offsets Funds for Recovery and Native Vegetation Rehabilitation Scheme programs. We are very pleased about this work as it will make a good start to match the considerable effort being put in by landholders and volunteers across the region.

Motivating and supporting shared management by landowners, volunteers and government agencies across thousands of hectares is a huge challenge. We are very excited by the progress that has been made in the first three years of the Blitz. It is an inspiring effort of a whole community working together.

At the end of 2021 Nature Conservation received the excellent news that the Western Australian Government’s State NRM Program would continue to fund the Arum Lily Blitz for a further three years. The Blitz is a long term campaign and there is still alot of work needed. Please join us in this war on the most widespread, damaging weed in our beautiful region. 



As nature lovers, we appreciate that all plants have their place, but unfortunately, the arum lily has no place here. This South African succulent herb may look striking with its white flowers and dark green foliage, but it presents several major issues.

  • It aggressively outcompetes native plants for resources and replaces beautiful, diverse plant communities with dense monocultures of a single species.
  • It reduces food availability and habitat for native wildlife.
  • It is poisonous to most stock, pets and people.
  • It affects farmers’ livelihoods by endangering their animals and competing with pasture plants.
  • It threatens the natural beauty and biodiversity on which the Margaret River region’s reputation and economy hinges.

This devastating weed now runs rampant across the region, but how did it get this bad?


During the Blitz we have learnt that the majority of landholders want to control arum lily on their properties. People are often uncertain how to go about it and they want to know that it is worthwhile, that others in their neighbourhood are also controlling the weed.

We have addressed these obstacles by providing free herbicide and instructions on how to spray, or how to manually control arum lily for landholders that have just a few plants. We are also working hard to get everyone in our region involved.  A coordinated, concerted and sustained efforts across the region is essential to snuff out this fast-growing, easily spread weed.

In 2018, Nature Conservation partnered with DBCA in developing the Arum Lily Management Plan for the Margaret River Region, which offers clear direction, a coordinated approach and outlines priorities for the 2018-28 period. The Shire of Augusta-Margaret River, City of Busselton, Lower Blackwood LCDC, Yallingup LCDC and the Margaret River Busselton Tourism Association have also signed onto the Blitz. But there is one critical piece of the puzzle remaining: You.


Whether you own a large rural property, a bush block, or a house in the suburbs, we’re inviting everyone to get involved. We are asking you to register as a participant in the blitz so we can let you know about assistance, keep you informed on progress, and so we can track where arum lily control is being undertaken. This will allow us to recruit other properties in your area, improving efficiency and reducing the risk of reinfestation. It also demonstrates participant numbers to our funding bodies, helping our chances of future funding for ongoing work.



The best time to control arum lily is when 50 to 70% of the plants are in flower. In our area that is usually in August to October.

If you plan to undertake arum lily spraying yourself we can help by providing FREE HERBICIDE and instructions for use of chlorsulfuron for arum lily control. Follow the link below to watch a video on how to spray arum lilies.

If you prefer to outsource the job, follow the link below for a list of recommended contractors who we know to be experienced, thorough and careful.

You can use the Arum Lily Blitz Information Sheet to share information about the blitz with others so that we get as many people involved as possible.

The Herbicide Application Record can be used by you or your spray contractor to record the work done. This data will enable us to monitor control being undertaken across the region and evaluate the success of the blitz.

If you plan to be undertaking manual removal of arum lilies please go to the links below to watch a video and to learn more.

We recommend that you take some before and after photos and there is information about this in the Guide to Arum Lily Control.

Instructions for use of chlorsulfuron for arum lily control


Thanks to Cowaramup Agencies for the production of this helpful video
and their generous donation of herbicide for the Arum Lily Blitz.