Panicum maximum, commonly known as Guinea grass, is a perennial grass native to open grasslands and savannas across Africa and in parts of the Middle East. It exhibits a rapid growth rate, reaching heights of 3-16 feet (0.9-4.9 meters) and spreading 2-3 feet (0.6-0.9 meters) wide. This species forms dense clumps and has a robust root system. The flowers are green and may go unnoticed, blooming in summer. The plant is primarily valued for its use as fodder due to its high nutrient content.

Guinea grass is appreciated for its ability to thrive in a variety of conditions, making it a popular choice for soil stabilization and as livestock feed in tropical and subtropical regions. It is well-suited to full sun exposure and can grow in a range of soil types, including loam and clay, provided they have medium to fast drainage. However, its aggressive growth can lead to invasiveness, outcompeting native flora and altering ecosystems. It is essential to consult local regulations and invasive species lists before planting Guinea grass outside its native range to prevent ecological disruption. It is invasive in South Texas, Sri Lanka, and Hawaiʻi, where it displaces natives and increases fire risk.CC BY-SA 4.0