I have a raised garden in the front yard that is weed root bound, I didn't do a thing with it the last couple of years. Before I start to bring it back to life, should I zap it with roundup first. The problem is, I tried to dig it up to take all the weed root out of it, it is so tight that I would have to get rid of all the soil in it to get rid of the root. I would be willing to do that , if it is the answer. I'm no gardener and all I can grow around here is two things and that is baby begonia and Hostas So thats all I'm going to grow