Turfgrass Science News

Every year around this time I start receiving questions regarding when to apply preemergent herbicides for preventing crabgrass establishment in lawns.  Crabgrass germination is driven by soil temperatures and because of this we cannot rely on a calendar date to tell us when to apply our preemergent products.  The reality is, if we wait too long and miss the window of opportunity to apply crabgrass preventers, these products will not do much for control of crabgrass.  For this reason I like to rely on a couple of website resources that help to determine when to make these applications.

By Matt Cavanaugh, Sam Bauer, and Dr. Brian Horgan

By Maggie Reiter, Graduate Research Assistant

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The University of Minnesota's Turfgrass Science Program conducts field-based research and offers education and consultation to both commercial turfgrass managers and homeowners caring for their yards. Want to search our site? Click here.

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For questions related to turfgrass extension, contact:

Dr. Brian Horgan, Professor
bphorgan@umn.edu or 612-624-0782
Dr. Brian Horgan

For degree questions, contact:

Dr. Eric Watkins, Professor
ewatkins@umn.edu or 612-624-7496
Dr. Eric Watkins