I am going to undergo a semi-major lawn renovation later this fall. The renovation will include removal of dead/diseased turf in front yard and slit seeding and slit seeding in the back. My question is about the removal of that pesky nimblewil weed that invades my lawn. I plan on spraying roundup on it as there are no known selective controls for this weed. How long will I need to wait after I spray the weed to plant/sew the new seed? Anyone have experience with this type of problem? Can I then simply remove the dead nimblewil or will I need to remove and replace the roundup contaminated soil as well before I plant? In the front, will removing all of the existing turf take care of the nimblewil, or should I spray that as well?