Abstract: A weed barrier/moisture retention device for covering soil of a bagged or potted plant. The cover features a disc of flexible weed barrier fabric having an outside perimeter edge situated at a radial distance from a center point of said fabric. A slit the fabric emanates outwardly away from the center point and intersects with the outside perimeter edge. Matable fastening elements are secured to the fabric at slit-adjacent edge regions thereof, and are selectively fastenable to one another in order to cooperatively close off the slit. In use, the slit of the fabric is slipped around a stalk of a bagged or plotted plant from one side thereof, and the fastening elements are coupled together at an opposing side of the stalk, thus forming a closed loop that provides a full 360-degree span of soil coverage around the stalk.