Put newspaper over the dirt 3-4 pages thick & then cover it with mulch. The newspaper will prevent any grass & weed seeds from germinating, but unlike fabric, it will decompose after about 18 months. By that time, any grass & weed seeds that had been present in the soil will be dead. It’s green, it’s cheaper than fabric, & when you decide to remove or redesign the bed later on, you will not have the headache you would with fabric.
Natural Weed Killer - Spring is coming and this is the BEST Weed Spray. I made 3 gallons for around $4.00 last year after seeing a pin. Worked better than Round Up & killed the weeds/stray grass on first application. One gallon of APPLE CIDER VINEGAR, 1/2 c table salt, 1 tsp Dawn. Mix and pour into a smaller spray bottle. (you can purchase 3 gallon size Apple Cider Vinegar in the canning section of a good hardware store - cheap!)