Best way to remove grass for new flowerbed?
I'm wanting to make a new flowerbed in my backyard. Currently, bermuda grass is there. What is the best way to get rid of the grass? Should I spray round-up where I want the bed to be, wait for the grass to die, then dig it up? Can I just rent a tiller and till the currrent grass all up? The bed will be quite large, about 70' long and about 10-20' wide depending on the spot. If I use roundup, will it stay in the soil? I've already have people tell me not to use roundup as it will decrease the quality of my soil for years. Any advice is appreciated.