Remove Top Layer of Lawn for Large Garden Bed
I am going to make a large garden bed for about 50 iris that I need to plant (in a raised bed). I wanted to know the best way to strip the top layer of grass off, level the ground and prevent any grass from coming up through the bed after i've planted.
Last year, I tilled a portion of the yard, but it just mixed the grass up with the soil. I constructed the raised bed and stapled the bottom with screen (to prevent critters) and lined it with weed barrier. It worked for a while, but the grass eventually came up. Is there a better way???