Wet newspapers and put layers around the plants overlapping as you go; cover with mulch and forget about weeds. Weeds will get through some gardening plastic; they will not get through wet newspapers. and 16 Ridiculously Useful Tips to Make Life Easier
Often times when we talk about Companion Planting we discuss the plants that should always be planted side-by-side in our gardens. I’m here to give you the dish on what plants to NOT plant together when you are companion planting! - Gardening And Patio
weed prevention for two years: newspaper will prevent any grass/weed seeds from germinating, but unlike fabric, it will decompose after ~ 18 months. By that time, any grass/weed seeds that were present in the soil on planting will be dead.
Good for flower bed- Lay down a thick layer of CARDBOARD in your raised garden beds to kill the grass. It is perfectly safe to use and will fully decompose, but not before killing any grass below it. They’ll also provide compost and food for worms.