Calcium- Crushed Oyster Shell

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Calcium Crushed Oyster Shell is a blend of crushed oyster shell and coral we use as a top dressing and media amendment for our Paphiopedilum and Phragmipedium. It slowly releases c alcium each time you water and helps buffer pH, which matters most when you grow with rainwater or RO water.To refresh pots mid-season, sprinkle 1–2 teaspoons across the top of the media. When repotting, mix about 1 tablespoon through the new mix. Many lady slippers grow naturally on limestone, and this is an easy way to give them the calcium they're adapted to without changing your fertilizer routine.Sold in a 1 lb tub. Plant-safe, inexpensive and long-lasting. Show more