Folks, I cut my lawn pretty short over the summer to avoid having to cut it twice. the little crabgrass I had turned into an infestation last year and I would like to know the best way to handle. Is there a good preventative I can spread? Is there a best time to apply a preventor/fertilizer? (I live outside Chicago) Does mowing shorter really spur crab grass growth? Is there anything else I can do? Please help, spring is right around the corner, and I want to make sure I have a plan for the thaw.