Master Nursery® Bumper Crop® Organic Soil Builder has always been known for its exceptional quality and rich biodiversity, and as an OMRI listed soil builder, it is trusted by gardeners across the United States.  Our balanced blend of sphagnum peat, aged wood fiber, cured compost, aged bark, lobster meal, worm castings, kelp meal, and dehydrated poultry manure ensures your plants get all the necessary nutrients for healthy growth and development.