Steve from Ia writes
Depending on environmental conditions, it could take three weeks to notice visible results from a Bonide Grass Beater Over-The-Top Grass Killer Concentrate application. After a couple of days from application, it will slow/stop growth and foliage burn may be noticed. It should be applied to actively growing listed weeds for best results. Most plants need to be in that growing state to have the chemicals respond effectively. As with any herbicide, you want to have no mowing or cutting of the target weeds/grasses for 2 full days prior to application and for 2 full days after application so the plant can fully absorb the chemical.
Answer last updated on: 03/13/2021