Agrostis capillaris aka Common Bent

Agrostis capillaris is a perennial grass in the Poaceae family. Gardeners know it as common bent, brown top, or colonial bent. Its native range runs from Europe to northern China and Afghanistan. It grows wild in Britain and Ireland. The species belongs to temperate regions, and suits cool, humid summers. Growers use it for lawns, pasture, and land repair.

This evergreen grass forms tufts that can join into mats. The RHS gives a height of 0.3–1.6 feet [0.1–0.5 metres]. Its listed spread reaches about 0.3 feet [0.1 metres]. Regular mowing keeps the turf dense and neat. Plants take time to establish from seed. The RHS lists about one year to reach mature size. PFAF describes its growth as more upright than creeping bent. It also notes that this species spreads less strongly.

Grow common bent in full sun or partial shade. It accepts clay, loam, sand, and chalk soils. The RHS lists acid or neutral soil as suitable. Choose soil that drains well, with moisture available for growth. The RHS recommends a sheltered site. Its H7 rating covers severe continental European winters. PFAF gives USDA hardiness zones 3–10. Sow seed in spring or early autumn. Prepare the ground first and remove weeds before sowing. Regular mowing remains part of its care as lawn grass.

Common bent has a long role in fine turf mixtures. Growers use it on tennis courts and golf fairways. It also suits informal gardens, coastal sites, banks, and slopes. Beyond lawns, it provides grazing for livestock and sometimes hay. Plantings can help hold soil and restore disturbed ground. PFAF also lists it for garden path mixtures. Its uses extend beyond its native range. That source flags weed potential, though it describes limited spreading compared with creeping bent.

Lawn health problems include dollar spot, Corticium disease, and Fusarium patch. The RHS also lists algae among possible problems. Ants, birds, chafer grubs, and leatherjackets may eat the seed. Such losses can affect sowings while the grass establishes. PFAF records no known edible or medicinal uses. It also reports no known hazards. That statement does not establish safety for people or pets.