Is redtop grass a native grass?

Redtop grass (Agrostis gigantea) is not a native grass to North America; it is originally from Europe and Asia. It has been introduced to various regions, including the United States, where it is often used for erosion control, pastureland, and as a forage grass. While it has adapted well and is commonly found in the wild, it is considered an introduced species rather than a native one.