Grassy Weed – Rough Bluegrass

(Poa trivialis)

Rough Bluegrass – also referred to as Roughstalk Bluegrass – is a perennial grassy weed. Poa trivialis can be found in a wide range of habitats throughout much of North America.

Identifying Rough Bluegrass -

Rough Bluegrass can be identified as a stolon forming perennial bending at the base. This grass is considered to be a weed because it is lighter in color than Kentucky Bluegrass or Perennial Ryegrass. It features a long ligule that is toothed at the tip. Its collar is smooth and broad and the sheaths are compressed and rough to the touch. The blades are flat, rough on the edges, and taper to a “boat-shaped” tip.

Rough Bluegrass plants may go dormant during summer months but will remain green through the winter. This weed often forms noticeable patches in home lawns.

Rough Bluegrass Control -

Much like Annual Bluegrass, there are no cultural control methods that can remove Rough Bluegrass. However, there are currently no known selective herbicides that can control rough bluegrass either.

Rough Bluegrass

Scotts LawnService recommends cultural weed control practices to reduce Rough Bluegrass in your lawn and landscaping. This is due to the limited number of selective weed control product options to kill this weed. However, this weed can be controlled with non-selective weed controls such as Round-Up® , which will kill this weed and surrounding turfgrass. Re-seeding may be necessary to repair treated areas where Round-Up is used.

Scotts LawnService is the trusted industry leader for professional quality lawn care. Our exclusive lawn care products include premium grass seeds and professional-grade fertilizers; our lawn service teams consist of highly trained, industry-certified professionals. Contact a representative today for Rough Bluegrass control options available in your area and to learn how you can enjoy a lush, thicker lawn that only Scotts Lawnservice can deliver.