Pure Earth Aeration Formula now comes in an easy to use white grow bag. Pure Earth is blended using superior, and all natural ingredients, insuring that your plants receive the natural benefits that only organics can provide. Pure Earth is a premium, organic-based potting soil. Two great sizes to choose from, 6 inches which is 3.5 liters and 8 inches which is 5.5 liters. No need to buy a separate pot. The bags even have pre-punched drainage holes.