Ageratina riparia is a perennial herb to subshrub measuring up to 1 m tall with numerous ascending and spreading stems. It can propagate by seed or by stem cutting. The fruits are dispersed naturally by wind, water and mud sticking to animals.
Mistflower can be harvested to use as a tanning agent. It is commonly used as an ornamental plant. Invasive in Africa, India, Indonesia, Papua New Guinea, Southeast Asia, Australia, New Zealand, Jamaica, Madagascar, and Hawaii.