Sean from Wantagh, Ny writes
The Atrimmec Plant Growth Regulator (PGR) is not a herbicide and will not kill or prevent germination of poa annua. It may have the same "slowing growth" effect on certain weeds as they do on grasses, but it will not reduce the amount of seed heads. Please view our Poa Annnua Treatment Guide for pre and post emergent herbicide recommendations.
Answer last updated on: 06/02/2022