Horse compost is the aerobically decomposed remnants of the organic materials passed by a horse. Horse compost is used in gardening and agriculture as a soil amendment, and commercially by the landscaping and container nursery industries making a richer, more fertile soil. It is also used for erosion control, land/stream reclamation, wetland construction, and as landfill cover. Horse compost is also used as a seed starting medium generally mixed with a small portion of sand for improved drainage. In The Garden Landscaping Materials can make a specialty mix to your specifications using horse compost to make a more potent, rich and fertile soil for your application.