Dactylis glomerata is one of those plants whose biography is inseparable from human history. Introduced from Eurasia and Africa across the cool-temperate world as high-quality forage, it has been sown into pastures, hay fields, and silage crops for centuries, valued for its palatability to livestock and its capacity to knit together mixed grass-legume swards. In meadows and rough grassland it forms dense clumping mats on deep, fibrous roots that make it genuinely useful for stabilizing disturbed soils and stream banks.

The tension with orchard grass is that it rarely stays where it is put. It has naturalized across much of the eastern United States and is considered invasive in some states, turning up in roadsides, field margins, and turf where it is distinctly unwelcome. Cats are reputedly fond of chewing the foliage, which accounts for the common name Cat Grass. The spring pollen can be a significant hay fever contributor when stands are dense. For conservation and wildlife plantings in appropriate regions, it remains a functional component of cover mixes for nesting and brood-rearing habitat; context and regional guidance matter here before siting it.