Hey guys, I have an account that has xeriscaped rock beds that should not have vegetation in them. I have applied round up about every 2 months and it takes care of the weeds for a time, but they come back. We are very careful to not blow clippings into the rock beds, however we do live in West Texas where the wind blows all the time, so I understand crap will blow in the beds no matter what. I was looking for something that possibly was a pre and post emergent in one and I found Pramitol. According to my local dealer it sterilizes the soil, making it so NOTHING will grow. But, on the website for the product it does not mention anything of soil sterilization, and states the product interrupts the photosynthesis cycle, killing the plant. Help!