Knowledgebase
Asked April 25, 2026, 9:57 PM EDT
Washington County Minnesota
Yes. We generally say when the Forsythia are blooming.
After the lilacs are done, it is too late.
Preemergent herbicides for crabgrass should be applied before soil temperatures are 55 degrees in the upper 1-2 inches for several days.
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This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.
