Crabgrass

Asked July 8, 2020, 10:00 AM EDT

My lawn is covered with crabgrass. Is there anything I can do now to stop it’s spread. I understand it will die off when it gets cool but it’s very unsightly now. I have very sandy soil. I also have large shaded areas that have very little grass.

Benton County Minnesota

1 Response

Thank you for writing.
It is too late to apply preemergent controls for crabgrass.
https://turf.umn.edu/news/spring-preemergent-applications-crabgrass
The key here is prevention. Core aeration improves your lawn and this prevents invasion. The taller the grass, the deeper the roots and this presents in invasion. https://www.startribune.com/less-is-more-when-it-comes-to-spring-lawn-care/375076241/
https://extension.umn.edu/lawns-and-landscapes/lawn-care

It may be that your shaded areas are improperly seeded. Perhaps a groundcover or a different grass like fescue would be appropriate. Re seeding is best done later in the season. https://extension.umn.edu/lawn-care/seeding-and-sodding-home-lawns