Discover the fast-growing and extremely invasive Black Wattle, also known as Acacia mearnsii. Native to Australia, this leguminous tree has been introduced to locations across the globe, making it one of the worst invasive species. It grows well in a range of climates and soil types, playing an important role in Australian ecosystems by binding erosion-prone soil and fixing atmospheric nitrogen. The Black Wattle produces deliciously rich protein and nectar for wildlife, providing a home for various insects and marsupials. Although widely considered a weed in areas where it has been introduced, the Black Wattle is still used for commercial tannin and firewood purposes.