How do I stop grass growth without using pesticides?
I‘m in a new build with the classic square patch of shitty, weed-strewn grass out the back. I recently got some big raised beds built by a builder, gravel put down on the rest of the garden. I’ve realised that the builder used allll the grass-covered soil he dug up from the old lawn to fill in the raised beds. I complained and he said it will die off because the grass is all buried in the earth, but I have zero faith in that statement. He then said to douse the beds in weed killer, but I don’t use pesticides (I’m transforming the garden precisely to plant a lot of native, fauna-friendly plants). He’s getting topsoil delivered on Monday to finish filling in the beds.
I really don’t want to have spent thousands of euro on raised beds that are essentially the new location for the shitty grass and weeds I had previously. Can anyone give me any advice?