i'm not going to use the premerge. i would use that on a customers property if they asked to, over time, reduce the amount of spraying. hence, would save them money in a couple years. i would just use that for return/long term clients. eventually when i have the kgb throughout the yard i will apply premerge once in the fall for the next years weeds. that will be a few years from now though. natural and organic is more for a long term effect. you will see a continual reduction every year. that is if used effectively.