Invasion by introduced plants is one of the more serious long-term threats to the integrity of Meelup Regional Park's native vegetation.

Environmental weeds are plants that establish themselves in natural ecosystems and proceed to modify natural processes, resulting in the decline of the communities they invade.

Weeds originate from interstate, intrastate or overseas and may or may not be declared under the Biosecurity and Agriculture Management Act 2007. The declaration imposes an obligation on all land owners to control declared plants on their properties. To help focus national efforts to address weed problems in Australia, a list of the most problematic weeds, Weeds of National Significance (WONS) was compiled.

Within Meelup Regional Park weeds are primarily concentrated along access tracks, boundaries with neighbouring properties, around highly visited sites or in disturbed areas. Invasion by introduced plants is one of the more serious long-term threats to the integrity of the park's native vegetation.

The most recent weed control survey conducted by Natural Area Consulting Management Services (2018) found the following WONS and Declared Plant species within the park:

  • Bridal Creeper (Asparagus asparagoides)
  • Arum Lily (Zantedeschia aethiopica)
  • One leaf cape tulip (Moraea flaccida)

Woody weeds such as the Sydney Golden Wattle (Acacia longifolia) are also a problem in the park and are hard to control. 


An annual weed control program is undertaken in the park, with contractors engaged to undertake the work. Weed species and weed locations are mapped each year to enable priority weed control work and to gauge the long-term success of the program. Weed management over the last two years has focussed on the following key areas:

  • Targeting spring and summer weeds and areas experiencing edge effects (such as coastal nodes,park edges, firebreaks and trails);
  • High Priority weeds including any Weeds of National Significance (WONS) and Declared Plant species; and
  • Reducing the weed density in revegetation areas in the Wildlife Corridor and Zone 6.

A major focus of the 2016/2017 weed control program was controlling Arum Lily. The central portions of the Park are essentially buffered from Arum seed sources on neighbouring properties so targeting the existing seed sources within the Park was given a high priority.

Following the 2017/2018 weed control program Natural Area Consulting Management Services (2018) recommend that ongoing weed control is recommended in 2018 in the following areas:

  • Park edges;
  • Treatment areas where weed cover was >10%; and
  • Treatment areas where ‘persistent’ weeds were present seasons of treatment to adequately control the populations.

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You can help preserve this special place in the following ways:

Stay on designated trails  |  Do not light fires in the park  |  Park in designated areas  |  Leave your pets at home  |  Use the bins and toilets provided  |  Do not dump garden waste  |  No Camping


Telephone: (08) 9781 0444