Knowledgebase

Crab grass pre emergent use #928006

Asked April 10, 2026, 1:18 PM EDT

Hi, I live in Hastings and would like some guidance on when to apply pre emergent crabgrass killer. I’m asking this on April 10. My lawn had a large amount of crabgrass for the last two years. Should I apply it now? Thank you. Brian Siemens.

Dakota County Minnesota

Expert Response

HI Brian,

Apply crabgrass preemergent when the soil temperature reaches about 60 degrees. This site will help you with timing. Type your zip code in and look at the map.

https://gddtracker.msu.edu/

Thanks!


MJ Replied April 13, 2026, 8:21 AM EDT

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