Down To Earth Oyster Shell, OMRI, 5 lb.

Down To Earth’s Oyster Shell 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. DTE Oyster Shell also aids in improving structure of soils and building optimum tilth. Help prevent calcium deficiencies that can diminish plant development.  Approved for use in organic crop production.  Mix and match single ingredient fertilizers to create specialized NPK recipes to precisely control plant nutrition at every stage of the growth cycle.