Andrew writes
When using Quinclorac 75 DF the kill time on weeds like crabgrass can vary on mix rate used and the maturity and growth stages of the weed. On average if you are using it with a surfactant it can take at least 14 days after application to see dead or dying weeds. Since summer is not the best time of year to treat for crabgrass and its much harder to control during this time, you may find that the results take longer or may have to do reapplications to get full control. You can retreat after 14-21 days.
Answer last updated on: 07/09/2018
