Dr. Earth Organic Compost Starter is a superior blend of alfalfa meal, seaweed extract, and beneficial soil micorbes. Use for all composting applications. Dr. Earth Compost Starter creates true humus using a 100% natural and organic formula. Compost Starter uses a combination of alfalfa meal, seaweed extract, and beneficial soil microbes to speed up the decomposition of organic materials. People and pet safe. 3 lb Box.