Paspalum caespitosum, commonly known as Blue Crowngrass, Bluegrass paspalum, Blue Paspalum, Slender Paspalum, or Knotgrass, is a perennial grass native to a variety of habitats including open grasslands, fields, and along roadsides in Southern North America, Central America, and South America. It thrives in a range of soil types, often preferring sandy or clay substrates. This species exhibits a rapid growth rate, typically reaching heights of 0.5-1.5 feet (0.15-0.5 meters). Its form is characterized by tufted clumps with narrow leaves, and it produces cream, inconspicuous flowers during the summer months. While the flowers are not particularly showy, they do contribute to the grass’s overall texture in the landscape.

Blue Crowngrass is valued for its ability to form dense ground cover and is often used for erosion control due to its robust root system. It is suitable for full sun to part shade conditions and is adaptable to various soil types, including clay, loam, or sandy soils with medium to fast drainage. It requires moderate watering and can be a low-maintenance option for gardeners. However, Paspalum caespitosum should be monitored for potential invasiveness, as it can spread aggressively outside its native range. Gardeners should consult local regulations before planting to ensure it is not considered invasive in their area.CC BY-SA 4.0