Black Swallow Oyster Shell Flour

Calcium is the work horse nutrient in ones garden, promoting strong root growth while improving nutrient uptake and the plant's ability to resist pathogens. There are a number of sources from which you can source calcium, however oyster shell flour is a very high quality source because it consists of 96% calcium carbonate, along with many micronutrients. Ground down to a fine powder, it provides a steady release of nutrients through the action of the soil microbiology, and helps to regulate ph levels along the way.