Arrhenatherum Elatius, or more commonly know as Tall Oatgrass, is a graminoid with green foliage and yellow flowers of the genus Arrhenatherum. It has a moderate growth rate and a height of 4 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring, blooms during early summer, is somewhat tolerant of shade and is routinely available commercially. Arrhenatherum Elatius or Tall Oatgrass's floral region is North America US Lower 48, Alaska and Hawaii, specifically in the states of Alaska, Alabama, Arkansas, Arizona, California, Colorado, Connecticut, Delaware, Georgia, Hawaii, Iowa, Idaho, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oregon, Pennsylvania, Rhode Island, South Dakota, Tennessee, Utah, Virginia, Vermont, Washington, Wisconsin and Wyoming.
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