I know at the end of the year, when we get the first frost, it kills off the cragrass. Was curious if anyone had any info about now. Crabgrass came up here in St. Louis earlier than normal with the warm temps then we had 2 weeks of super cold temps with a few heavy frosts. Will this frost kill of the crabgrass in the early tiller stages? If you have any articles I could referrence online regarding this, I would greatly appreciate it. Thanks Guys!