Agrostis Exarata, or more commonly know as Spike Bentgrass, is a graminoid with green foliage and yellow flowers of the genus Agrostis. It has a moderate growth rate and a height of 3 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring summer fall, blooms during late spring, is intolerant of shade and is routinely available commercially. Agrostis Exarata or Spike Bentgrass's floral region is North America US Lower 48 and Alaska, specifically in the states of Alaska, Arizona, California, Colorado, Idaho, Kentucky, Montana, Nebraska, New Mexico, Nevada, Oklahoma, Oregon, South Dakota, Texas, Utah, Vermont, Washington and Wyoming.