What Is Ryegrass on a Golf Course?
Ryegrass: A cool-season grass used as permanent turf in the north and as winter overseed in the south.
Ryegrass — full definition
Perennial ryegrass (Lolium perenne) is a cool-season grass used in two primary ways on golf courses: as a permanent turf on fairways and rough in cooler climates (Pacific Northwest, northern California), and as a winter overseed on bermuda courses across the South. When southern courses overseed in fall, they spread ryegrass seed over dormant bermuda to maintain a green, playable surface through winter. This is why many southern courses close briefly in October for "overseeding season." Ryegrass germinates quickly, produces a bright green color, and provides clean ball-turf contact on approach shots.
Ryegrass — frequently asked
Ryegrass — how is it used?
- Permanent fairway/rough turf in cooler climates (Pacific Northwest, northern California)
- Winter overseed on bermuda courses across the South
- Southern courses close briefly in October for “overseeding season”
Ryegrass — how does it play?
- Bright green color with clean ball-turf contact
- Germinates quickly — ready to play within weeks of seeding
- Provides a consistent playing surface through winter months
More on Ryegrass
Ryegrass is two different products depending on where you are standing: permanent turf up north, a winter coat down south.
- OverseedingThe southern half of ryegrass’s job.
- Golf courses in OregonWhere ryegrass is the fairway, not the overseed.
- Golf courses in ArizonaOverseeded every autumn, without exception.
Other grass types
Bermuda Grass
The dominant warm-season turf across the southern United States — dense, grainy, and affects ball roll.
Bentgrass
The preferred putting green grass in the northern U.S. — ultra-smooth, fast, and true-rolling.
Poa Annua
Annual bluegrass — considered a weed on most courses, but the intentional putting surface at Pebble Beach and top West Coast tracks.
Zoysia
A warm-season grass popular in the transition zone — handles both heat and cold better than alternatives.
Paspalum
A salt-tolerant warm-season grass for coastal and island courses — can survive ocean spray and brackish water.
Fescue
A cool-season grass family — fine fescue creates the iconic golden links-style rough, tall fescue is used on fairways.
Kentucky Bluegrass
The backbone of northern fairway turf — dense, self-healing, and provides clean lies.
Overseeding
Spreading cool-season grass seed over dormant bermuda in fall to keep courses green through winter.