by Sam Bauer
For those of you who are wondering when to put your preemergent summer annual grassy weed herbicides down, NOW IS THE TIME. Soil temperatures are near 55 degrees in the upper profile and crabgrass will be germinating at 60 degrees. Any preemergent applications made after crabgrass has germinated will be ineffective. This application can be combined with fertility for increased density and spring turf greenup. Be sure to apply at the correct rate as directed by the herbicide and fertilizer label.