Roughstalk Bluegrass Weed Killer

Poa trivialis Herbicide

Description of Bluegrass, Roughstalk (poa trivialis):
Poa trivialis, also known as Roughstalk Bluegrass or Poa triv, is an unwanted grassy weed where, like Poa annua, creates light green blotches in an otherwise beautiful and uniform patch of dark turfgrass. However, unlike Poa annua, it is a perennial; therefore it will come back every year unless eliminated fully. It spreads by stolons (roots on the soil's surface, as opposed to rhizomes which are below the soil surface), but can also produce seed.

There are three ways to differentiate Poa trivialis from Kentucky bluegrass:
  1. Poa trivialis has a lighter color.
  2. Poa trivialis tips are more pointier.
  3. Kentucky bluegrass does not spread by stolons("vines" above the surface), but rather rhizomes (roots under the surface).

Other common name: Rough Bluegrass

Control Options for Bluegrass, Roughstalk

No Control
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Spot Treatment
Label Rate:
0.01 - 0.02 ounces per gallon
Cost Effectiveness:
Makes 55.37 - 88.59 gallons
at a cost of
$1.01 - $1.62 per gallon
Broadcast Treatment
Label Rate:
0.03 - 0.05 ounces per 1,000 sqft
Cost Effectiveness:
Covers 27225 - 43560 square feet
at a cost of
$2.06 - $3.30 per 1,000 sqft
Safe On
Bentgrass, Kentucky Bluegrass, Bermudagrass, Bahiagrass, Centipedegrass, Kikuyu Grass, St. Augustinegrass, Seashore Paspalum, Zoysiagrass, Buffalograss Safe Rate:
0.01 - 0.02 ounces per gallon
0.03 - 0.05 ounces per 1,000 sqft
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