Espoma® Organic Seed Starter Premium Potting Mix 16-Quart Catalog Lawn & Garden Soil Potting Espoma® Organic Seed Starter Premium Potting Mix 16-Quart Manufacturer : Espoma Natural Gardening Solutions Description Espoma Organic Seed Starting Mix is a rich, premium blend of sphagnum peat moss, peat humus and perlite that has been enriched with Myco-tone®. Rates Please contact us for current pricing and availability.