A fence post base featuring a circumferential disc that provides a larger ground coverage area than that of the fence post itself is disclosed. The disc prevents weeds and grass from growing immediately adjacent to the fence post by cutting off sunlight to the relevant area of ground. Since the expanded disc sits at or immediately above the ground, it may be ridden over by a standard lawnmower, allowing the mower's cutting parts to reach all areas of grass and weeds without the need for an edging mower or clipper. The device may be made for a variety of fence posts and may feature a slit to all for the device to expand and contract in extreme temperatures without breaking.
