Check the listing for details. OYSTER SHELL FLOUR Organic Natural Fertilizer Chitin Feed for Healthy Plants. Condition: New. Listed at 9.95 USD. Organic Fertilizer and Animal Safe Feed OYSTER SHELL FLOUR Oyster Shell Flour is an all natural soil amendment that provides on-going calcium and nutrients to promote healthy soil and plants. It is produced from shells and conforms to USDA National Organic Program (NOP) standards for organic agriculture usage. This is an organic product that provides a continuing, slow release of nutrients to allow plants to better absorb essential micronutrients. The oyster shell flour acts as a liming agent and buffers soil pH levels. It also contains Chitin which promotes new growth, boosts a plant's immune system and resistance to disease, and increases nutrition uptake. It also helps prevent soil compaction and improves aeration. This Oyster Shell Flour is safe for the environment and animals. Shipping within the U.S. is Free via USPS First-Class Mail Delivery Time is estimated at 1 to 5 business days within the U.S. Contact Seller if any other information is needed View Other Items 100% Buyer Satisfaction Guaranteed