Setaria faberi, commonly known as giant foxtail, is a species of grass native to Asia and parts of North America. It typically grows in disturbed areas, such as roadsides and agricultural fields, reaching heights of up to 1.5 meters. The plant features long, slender leaves and distinctive, bushy flower spikes that can be green or purplish in color. This grass is often considered a weed due to its rapid growth and ability to outcompete crops. Setaria faberi can produce a large number of seeds, which contribute to its spread. It is important for farmers to manage this species to protect their crops and maintain healthy ecosystems.