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How to Manage Pests

The UC Guide to Healthy Lawns

Rough bluegrass — Poa trivialis

Photo of rough bluegrass


Rough bluegrass is best adapted to wet, cool, and shady areas. A cool-season grass, it is sometimes used for shaded turf in the fog belt areas and can be used to overseed dormant bermudagrass.

Identifying tips

A fine-bladed yellow-green grass. Leaves are folded in the bud, there are no auricles, and a membranous ligule is present. Leaf blades slightly taper to form a boat-shaped tip. The lower surface of the blade is glossy; the upper surface has a characteristic median midrib. Rough bluegrass has a shallow root system and spreads by stolons.


Moderate maintenance. Rough bluegrass requires rich soils and a lot of water. It tolerates low temperatures, but will not tolerate wear, heat, or drought.

Illustration of collar of rough bluegrass
Collar of rough bluegrass
Illustration of overall plant of rough bluegrass
Overall plant structure of rough bluegrass

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