The Q&A Archives: Annual Grass in Lawn

Question: I planted a new lawn two years ago. This year, as the days began to warm up, we noticed a lot of annual blue grass in the lawn. Is there any way to remove this without destroying the rest of my lawn? I was told by a local nursery that the only way to get rid of this was to use Round-up on the trouble spots and then re-plant in two to three weeks. I would like to avoid this since we do a lot of entertaining in our yard and would rather not have big brown patches.

Answer: Poa annua, annual bluegrass, spreads by seeds and by rhizomes and isn't your typical annual, at all! Unfortunately, the only way to remove it is to dig it out roots and all, or use the herbicide glyphosate (Round-Up). Because the weed is so similar to the desired grasses in most lawns, anything you use to kill it will kill all grasses. Get a jump start on it now and you won't have to battle it all summer. The brown patches will green up in a few weeks after planting - and April is an excellent time to reseed bare areas.

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