Overview Olympus Myco 97% Pure Gypsum Powder is a versatile soil and substrate amendment designed for gardeners and mushroom cultivators. Each 1 lb bag features high-purity calcium sulfate dihydrate that can support healthier root systems, better substrate structure, and balanced moisture movement. While not...

Overview Olympus Myco 97% Pure Gypsum Powder is a premium calcium sulfate dihydrate designed to support a range of growing needs. Packaged in a HEPA enclosure and supplied in a 10 lb bag, it’s ready to mix into substrates or soils for added structure...

Overview Olympus Myco 97% Pure Gypsum Powder is a high-purity calcium sulfate dihydrate soil amendment designed to improve soil structure and substrate health. Packaged in a practical 5 lb bag, it blends easily into garden beds, lawns, and mushroom growing substrates, delivering consistent granule...