Red Mulch - Garden - Plastic Film - 4ft. X 25ft. 1.0 Mil Embossed By Grower's Solution According to Cornell and Clemson Universities, tomatoes grown on red mulch product higher yields. Also eggplant have also shown increased yields when grown on red. Red mulch reflects intensified red light to the developing plants which increases their photosynthetic capacity. This hot cast film is extremely strong and elastic in all directions. Almost total weed control.