Big Red Worm Castings contain minerals that are essential for plant growth, such as concentrated nitrates, phosphorus, magnesium, potassium, and calcium. These minerals are immediately available to the plant, without the risk of ever burning the plant. Remember that animal manure and chemical fertilizers have to be broken down in the soil before the plant can absorb them.
Big Red Worm Castings contain a highly active biological mixture of bacteria, enzymes, remnants of plant matter and animal manure. The castings are rich in water-soluble plant nutrients and contain more than 50% more humus than what is normally found in topsoil.