QUALITY - Seed Starting Mix with Compost - 16 Dry Quarts - FREE SHIPPING! Excellent Seed Germinating Mix - Made from all natural ingredients. Developed and tested to maximize root and stem development. Our Seed Starting Mix is easy to use; pour and plant. Ingredients: Coco Coir 45% - 55%, Sphagnum Peat Moss, Volcanic Pumice and Compost. Follow the seed packet instructions for planting depth, moisture and additional guidelines.