Crabgrass in your lawn needs to be treated in the late summer or very early fall before the good growing season begins. https://www.howtowithdoc.com/crabgrass-in-bermuda-lawn/
Doc applies both a crabgrass killer and a fertilizer on the same day. We need to get this lawn treatment down before the cooler temps hit.
Did you miss our previous article...
https://lawnmaintenancetips.com/fall-tips/scotts-fall-lawn-maintenance-checklist