Calcium- Crushed Oyster Shell

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We are now offering Crushed oyster shells and coral as a media amendment or topping additive. This product is plant safe and is used on our potting mixes when we repot our paphiope dilum and phragmipedium. We use this product to help buffer pH levels in the media and help slow release a little extra calcium when we water. Available in 1lb tubs as pictured. We will add this calcium product 1-2 teaspoons sprinkled across the tops of pots to refresh mid season, or add a table spoons mixed throughout the media when we do a repotting. Show more