Shawn from Wi writes
My lawn is full of grassy weeds, annual bluegrass, foxtail, Quack grass, etc. If I wanted to broadcast apply something to my entire lawn, kill everything undesirable leaving only the Kentucky Bluegrass in-tact, is this the product I'm looking for?
Grass Out Max is a non selective grass killer, meaning it will kill your KGB as well. A better option would be use Q4 for everything but the quackgrass and the poa annua. Unfortunately there is not an herbicide that would kill the quackgrass nor poa annua without damage cool season turf, such as Kentucky Bluegrass. If only a small area of the lawn is affected by the outbreak, spray only the affected area with RoundUp Quick Pro. If the problem amounts to no more than a few spears of quackgrass in an area of your lawn, paint the individual spears with diluted RoundUp QuickPro. Becareful to avoid getting the product on desirable grass. If most of the lawn has been affected by quackgrass, the only sure fire way to get rid of it is to spray the entire lawn with Roundup. Spray when the lawn is growing actively, preferably in the spring. The treatment will kill the lawn grass as well as the quackgrass. After about two weeks, you may begin the replanting.
Answer last updated on: 06/27/2018
