The Q&A Archives: Invasive Grasses in Lawn

Question: We killed and replanted our lawn two years ago. This year we are having a problem with a new unwanted grass in our lawn that is very short, sprouts and goes to seed before the rest of the lawn is long/tall enough to mow. This is causing the unwanted grass type to increase. Any suggestions on how to get rid of it without starting over again?

Answer: What you describe sounds like Poa annua, or annual bluegrass. This is an extremely difficult weed to control. There are herbicides that work only on annual bluegrass and not on other grasses (they contain DCPA) and they should be applied in early fall to keep the seeds from germinating. Apply according to label directions. Best wishes with your lawn!

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