BioAdvanced Season Long Weed Control for Lawns is a pre- and post-emergent formula that kills existing listed broadleaf weeds and nutsedge while preventing listed broadleaf and grassy weeds for up to 4 months. When used according to label directions, Season Long Weed Control for Lawns won't harm lawns. Apply anytime between Spring and Fall when temperatures are between 50 and 90 degrees. Lawn care has never been easier. BioAdvanced. Get More From The Blue Bottle.