Oyster Shell [1kg]Oyster Shell is an all-natural and high-quality source of the essential plant nutrient calcium.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. Oyster Shell also aids in improving structure of soils and building optimum tilth. Benefits of Oyster Shell to PlantsOyster Shell is an all-natural and high-quality source of the essential plant nutrient calcium. 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. Oyster Shell also aids in improving structure of soils and building optimum tilth. These oyster shells are full of calcium carbonate & phosphor. Using these oyster shells are good for preparing the calcium carbonate & phosphor in the garden. These oyster shell flours are reacting like the calcium carbonate. Calcium carbonate in the oyster shell flours are very good for correcting the PH of the soil. Also, these materials or flours are neutralizing the acidity of the soil & increasing the PH of the soil. On the other hand, calcium carbonate in the oyster shells are alkaline. The other benefits of using oyster shells in the garden is good because the calcium carbonate in the oyster shell is going through the products.