Ground Cover, black 15.5 x 300 feet, Our best – Woven ground cover consists of 3.2 oz. polypropylene, which is resists tearing, puncturing and weed penetration. It is approved by most government weed control applications. It is ideal for greenhouses, outdoor displays and as a weed barrier for planting without topical coverings where wee-free environment is a must. Ground covers are the ideal choice for safe weed control and water conservation.