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Wednesday, November 25, 2020

FAQ: How can I get rid of Poa annua in my lawn?

 

Rasbak, CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons
Poa annua - Credit Rasbak, CC BY-SA 3.0

Poa annua is also known as annual bluegrass. It can be a real pest. Though it is an annual, it re-seeds prolifically and returns to your lawn year after year.

There is no really effective chemical treatment that I know of for killing Poa annua in the lawn. Focus on preventing seed germination. Apply weed pre-emergent in spring and fall. Follow label instructions. Don’t use a chemical that is incompatible with your lawn grass species. The seeds are very tough and persistent, so it might take a few years to get it under control. 

Try to eliminate Poa in non-lawn areas, where possible, with glyphosate application. Also beware of importing seeds into the area on lawnmowers that have been used elsewhere. 

I hope this helps.

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