Has anyone used a herbicide on a bluerug juniper bed to get rid of grass and weeds. What concentration? My idea is to weedeat higher weeds down, blow off, pull up loose branches, and then mulch covering maybe 60% of plants wait and then spray the weeds that come through. What do you think? I would consider ripping out but it is a mature planting and in good shape except for weeds. Last year went threw pulling weeds more this year than last!