Frank from Douglassville, Pa writes
For post-emergent control of Poa Annua in cool season grass there's only one that is labeled for it and it's Prograss. You can hit it with a high nitrogen fertilizer to burn it out or wait until temperatures hit 85 degrees and up for it to die out. The best time to treat is in the fall with a pre-emergent, one of the best ones for this is Pendulum or Dimension. Your other options would be to either spot-treat with a Roundup-type product and then reseed with the cool season grass you have in those areas.
Answer last updated on: 07/31/2018
