Kentucky bluegrass was previously thought to be indigenous to the mountains of the Northeast along the Canadian border. However, it was introduced as a cultivar from Europe, and has been bred into multiple cultivars since its introduction. Because of its extensive use for lawns and in pastures, it is common in most grasslands, even those managed for native species. Canada bluegrass is also naturalized from Europe. Their effects on the natural systems are equivalent and therefore should be treated as one problem.
Kentucky bluegrass is a common lawn and pasture grass.
It is found in meadows, fields, and semi-open woods throughout the United States. Kentucky bluegrass is usually found on more mesic and fertile soils, although it will grow on dry neutral or alkaline soils. However, its shallow root system makes it susceptible to high soil temperatures and low soil moisture. Bluegrass has successfully invaded both remnant and restored prairies, savannas, and barrens. Establishment can be attributed to intentional introduction, past mowing, grazing, or cessation of fire.