Perennial ryegrass is a cool-season grass known for its quick germination and establishment. It thrives in temperate climates and is often used for lawns, sports fields, and erosion control due to its dense growth and ability to tolerate foot traffic. This grass type features fine, narrow leaves and a rich green color, making it visually appealing. Perennial ryegrass is also commonly blended with other grass species to enhance durability and adaptability in various soil types and environmental conditions.