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.
Heavily newspaper your garden beds before you put down mulch. Weeds cannot grow through the newspaper, and the decomposing paper feeds your soil. Best gardening tip I ever got! Especially if you then put landscape fabric on top of the newspaper.
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