Japanese stiltgrass poses a significant threat to native wildlife because of its highly adaptable nature. This plant can thrive in a wide range of ecosystems including: forested edges, floodplains, fields, stream banks, trails, as well as being a formidable weed in lawns and gardens. Japanese stiltgrass tend to establish themselves well in disturbed areas, sprawling past these locations once established. They are capable of growing in many light conditions, especially thriving in shaded areas. Ecosystems that have established populations of Japanese stiltgrass tend to see a decrease in biodiversity. These plants crowd out early season plants, and displace habitat for native animals, in turn fostering beneficial habitat for other invasive species. It has also been observed that native grazers, such as white-tailed deer, avoid Japanese stiltgrass, propagating their ability to thwart native plants. Each individual plant can produce between 100 and 1,000 seeds, which can remain in the soil bank for at least 3 years.