Crabgrass preventer

Asked April 18, 2020, 11:45 AM EDT

Should lawn be freshly mowed before putting down fertilizer with crabgrass preventer?

Roscommon County Michigan

1 Response

Does not necessarily need to be mowed, but does necessarily need to be cleaned up before application. Pre emergents set up a barrier on the soil surface to prevent crabgrass germination. Any raking or disturbance after application can compromise that barrier. Get the lawn as clean as possible before application and leave it alone after. Read more here:
https://www.canr.msu.edu/news/preemergence_herbicide_applications_for_crabgrass_control

Here is a pre emergence timer you can use each year for your zip code: http://www.gddtracker.net/?model=7&offset=0&zip=49103

Good luck!