bentgrasses

Bentgrasses are a group of cool-season grasses in the genus Agrostis (family Poaceae) known for their very fine texture and dense turf. They are widely used as turf in temperate climates, especially on golf greens and fairways. The principal turf forms are creeping bentgrass (Agrostis stolonifera) and common bentgrass (Agrostis capillaris).

Taxonomy and species: The genus Agrostis comprises about 50 species distributed worldwide, with several adapted to moist, acidic, or well-drained soils. Creeping bentgrass and common bentgrass are the best known for turf use, selected for fine leaves, high shoot density, and ability to be mowed very short.

Growth habit and appearance: Bentgrasses have slender leaves and form dense turf. Creeping bentgrass spreads by aboveground stolons, creating a smooth, uniform surface, while common bentgrass tends to be more tufted but can form low-density carpets under favorable conditions.

Environmental requirements and management: Bentgrasses prefer cool-season climates and moist, well-drained soils. They require regular irrigation and fertility to maintain color and density. On greens, they are mowed very short and often receive frequent aeration and topdressing to sustain a smooth surface.

Problems and limitations: Bentgrasses can be susceptible to diseases such as dollar spot and brown patch, and to drought or heat stress in hot summers. They may decline in poor drainage or extreme shade, and can be outcompeted by other grasses or by annual bluegrass (Poa annua) if not properly managed.