WSU Extension


Weeds : Bentgrass, creeping : Agrostis stolonifera
(revision date: 9/3/2015)

Family: Poaceae (Graminae)
Cycle: Perennial
Plant Type: Grass

Use Integrated Pest Management (IPM) for successful weed management.

Creeping bentgrass is a low-growing, perennial grass. Unmowed plants can reach 8 to 20 inches in height. The leafy stolons lie along the ground, rooting in the soil. In lawns, these flat patches can be unsightly. Leaf blades are narrow and flat, with pointed tips. The finely branched panicle (seed head) is typically closed, but opens when the plant is blooming. SPECIAL INFORMATION: Bentgrasses in lawns can produce large amounts of thatch, particularly if they are overfertilized and not mowed short. Thatch buildup can interfere with water availability to grass roots and can contribute to other lawn problems.
Bentgrasses are often problem weeds in lawns both east and west of the Cascades. Also, lawns consisting of mostly bentgrass are common west of the Cascades.

Management Options

Non-Chemical Management
  • However, this is very time consuming and frustrating.
  • Digging and carefully removing the roots will reduce the number of plants, but will not get rid of it.
Select non-chemical management options as your first choice!

Chemical Management

Apply according to label directions. Spot treatments with certain post-emergent herbicides will control weedy grasses, but will also kill the turf. Glyphosate products should be applied as spot treatments only! NOTE: Some ingredients listed here are only available in combination. Read the label carefully on combination products to make sure the product is suitable for your specific situation.

Landscape areas
  • glyphosate
  • dichlobenil
  • fluazifop
Turf areas
  • glyphosate
Bare ground areas
  • glyphosate
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Caption: Creeping bentgrass
Photo by: B.M. Johnson
Caption: Creeping bentgrass stolon
Photo by: B.M. Johnson
Caption: Creeping bentgrass
Photo by: T. W. Miller