A significant portion of the weeds currently overruning our waterways and infiltrating national parks originates from garden plants that have escaped cultivation. Despite the recognition of the dangers posed by certain species, such as English ivy and gazania, which have been banned in various regions due to their invasive nature, these plants remain available for purchase in local nurseries and online platforms.
Imogen Ebsworth from the Invasive Species Council highlights that over ten years ago, authorities acknowledged the threat posed by escaped garden and aquarium plants to the environment and wildlife. However, despite these concerns, there has been little progress. The nursery industry had pledged to self-regulate, but this initiative has proven ineffective. As a result, the onus now falls on average Australians, who are expected to either have formal botanical knowledge or meticulously scrutinise plant labels, to prevent their gardens from becoming potential ecological disasters.
Ebsworth notes that governments have recently concluded that regulation is essential to mitigate risks similar to those posed by lantana, which has wreaked havoc on the environment. She emphasises that a wide array of ‘safe’ plants are available, allowing garden enthusiasts to cultivate vibrant, diverse landscapes without contributing to the spread of new invasive weeds across the country.
The spread of non-native species continues to be a pressing issue, and it is crucial for consumers to be aware and informed when selecting plants for their gardens. With appropriate regulations and public awareness, it is possible to enjoy gardening while safeguarding Australia’s unique ecosystems.
For those interested, a selection of popular household plants that have escaped cultivation and become invasive weeds can be explored further.