12 LB, Earthworm Castings, Richest, Most Natural Compost Available, Naturally Non-Burning & Odorless, Worm Castings Add Essential Organic Matter That Increases Microbial Activity For A Living, Nutrient Rich Soil, Use For Seed Starting, Indoor & Outdoor Plants & Gardens Including Container Gardens, Trees & Shrubs, Simply Sprinkle A Small Amount In Soil, Slowly Enriches Soil With More Nutrients Than Most Yard Compost Without Burning Plants, All Organic, OMRI Listed.