planting in front of arborvitae hedge?
I have a ~20-30' tall 15 year old arborvitae hedge. I am trying to plant a second row of shrubs in front of the hedge (about 3 feet in front of the arbs) but everywhere I dig I run into roots. I don't want to chance killing the arbs, since they provide needed privacy to our property! Is it ok to snip one or two of these surface roots (they are about 2" or so underground) or will this kill off a portion of the arborvitae? I'm currently trying to plant some ornamnetal grasses, so I don't need to dig very deep, but I do need to dog down some. How deep do most of the arbs roots typically run? We are in a VERY windy area, if that makes a difference.