Down To Earth's Oyster Shell fertilizer can help prevent calcium deficiencies that affect plant development. It is an all-natural and high-quality source of the essential plant nutrient calcium. Ancient oyster shells are carefully harvested and then ground into small, medium and coarse particles. These irregular shapes provide a sustained release of this valuable nutrient. Down To Earth Oyster Shell also aids in improving structure of soils and building optimum tilth.
Listed by the Organic Materials Review Institute (OMRI Listed) for use in organic production.
