Tall grass refers to various grass species that grow to considerable heights, often exceeding the size of typical lawn or pasture grasses. These grasses are found in diverse habitats, including prairies, savannas, and wetlands, across different climatic zones. Tall grass species play a crucial ecological role, providing habitat and food for numerous wildlife species and contributing to soil health and biodiversity.

Over evolutionary time, they have adapted to a range of environmental conditions, from dry plains to water-logged areas. Their ability to grow quickly and densely makes them effective in preventing soil erosion and capturing carbon, making them important in both natural ecosystems and land management practices.