Down to Earth Oyster Shell

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Down To Earth Oyster Shell - OMRI Oyster Shell flour is an all-natural source of high quality calcium that is ground into varying particle sizes to ensure an immediate and sustaine d release of this valuable nutrient. Calcium promotes strong root development, improves nutrient uptake and boosts plant immunity. OMRI Listed®. Product cannot be shipped to (IA, MS, ND, SD, WV, WY) Show more