The newspaper will prevent any grass and weed seeds from germinating, but unlike fabric, it will decompose after about 18 months. By that time, any grass and weed seeds that were present in the soil on planting will be dead. It’s green, it’s cheaper than fabric, and when you decide to remove or redesign the bed later on, you will not have the headache you would with fabric.
Curious to see if this works. Simple soil test and how to upgrade your soil structure. Fill quart jar 1/3 full of topsoil and add water to almost full. Shake to dissolve clumps & let jar sit overnight to determine soil structure and how to improve it. Excellent stuff on this site.