Invasive plants can be a gardener's nightmare, but they don't have to be the end of your green thumb dreams. While colorful blooms like agapanthus, morning glory, gazania, and foxglove might initially catch your eye, they can quickly become environmental and financial burdens. These plants, often chosen for their hardiness and quick growth, can spread rapidly, invading your garden and even outcompeting local flora. But fear not! There are ways to create a sustainable, eco-friendly garden that supports local wildlife and biodiversity.
The Problem with Invasive Plants
In Australia, the issue is particularly pressing. As Carol Booth, policy director at the Invasive Species Council, notes, three-quarters of the country's invasive species come from escaped garden plants. These plants don't just spread across your garden; they can invade bushlands, riparian areas, and even damage your home. For instance, highly invasive roots can infiltrate sewerage pipes or compromise foundations, as bamboos are known to do.
The lack of national regulation in the nursery sector exacerbates the problem. Home gardeners are left to research and make informed decisions about what to plant, a responsibility that should ideally be shared by the government. While the Australian government has identified 32 weeds of national significance, prohibited for sale, distribution, or growth, there are thousands of other invasive species that vary depending on your location.
Choosing the Right Plants
So, how do you navigate this minefield of invasive plants? Horticulturalist Marg Allan recommends a multi-pronged approach. Check your local council's weed list, explore Gardens for Wildlife programs, and consult with nursery staff. These resources can help you make informed choices about what to plant.
Nick Nosek, another horticulturalist, emphasizes the importance of connecting with nature and learning about your local environment. Resources like the Grow Me Instead database and state initiatives like Gardening Responsibly can guide you in selecting plants that support local insect and wildlife.
Recommended Alternatives
Here are some invasive plants and their eco-friendly alternatives:
- Agapanthus: Opt for blue flax lilies (Dianella species).
- Foxglove: Try snapdragons, delphiniums, or white correa.
- Morning Glory/English Ivy: Purple coral pea, wonga vine, or native clematis species are great alternatives.
- Gazania: Paper daisies are a similar yet less invasive choice.
- Mother-in-Law's Tongue: Lomandra species and flax lily species are recommended.
The Benefits of Native Plants
Growing native and indigenous plants is a win-win for your garden and the environment. These plants often require less water and some even thrive without fertilizers or pesticides, saving you money. Fiona Cross, a horticulturalist, highlights the importance of understanding the difference between native and indigenous plants. While native plants can be from anywhere in Australia, indigenous plants are naturally found in a specific local area, making them more suited to the environment and less likely to become invasive.
Indigenous plants also enhance wildlife corridors, attracting a diverse range of insects, lizards, and animals. Golden everlasting daisies, for instance, are perfect for balconies, attracting pollinators and adding a touch of color. Smaller flowers that attract bees, moths, and butterflies are crucial for ecological balance.
Looking Ahead
The Australian government recognizes the threat posed by invasive plants and is taking action. A threat abatement plan is being developed in collaboration with state and territory governments, aiming to provide a national framework to reduce the impact of these weeds on native species and ecosystems. This plan may include regulations to further control the spread of invasive plants.
In conclusion, creating a sustainable garden involves careful plant selection and a commitment to supporting local ecosystems. By choosing native and indigenous plants, you can enjoy a vibrant garden while contributing to the preservation of Australia's unique environment and biodiversity.
