Olympus Myco Gypsum Powder 1 lb – 97% Pure Calcium Sulfate, High Solubility for Gardens, Lawns & Mushroom Substrates

Olympus Myco 97% Pure Gypsum Powder is a high-solubility calcium sulfate dihydrate soil amendment designed to improve soil and substrate structure for gardens, lawns, and mushroom cultivation.

Gympsum powder from Olympus Myco is a concentrated, solution-grade calcium sulfate (97%–99% purity) formulated to loosen compacted soils, improve moisture distribution, and supply calcium and sulfur without altering pH dramatically. This one-pound package is sized for hobby gardeners, small lawn repairs, and substrate mixes for mushroom growers who want a clean, consistent additive that dissolves readily and integrates smoothly into potting mixes or bulk substrates.

How does Olympus Myco gypsum improve soil and substrate structure?

Gypsum acts physically and chemically to reduce compaction and create better pore space for air and water movement. It helps flocculate heavy clay particles and loosens dense substrates, making it easier for roots and mycelium to expand.

• Breaks up compacted clay and dense potting mixes for improved drainage.
• Increases pore spaces to boost oxygen availability for roots and mycelium.
• Helps prevent hard crusting on topsoil and substrate surfaces.

What nutrients does this gypsum add and how do they benefit plants or fungi?

Olympus Myco gypsum supplies bioavailable calcium and sulfur, two elements important for cell wall strength, nutrient uptake, and enzymatic processes. Because gypsum has minimal effect on pH, it’s a targeted way to add these nutrients without dramatically changing soil acidity.

• Provides calcium to support root structure and cell development.
• Delivers sulfur, which supports protein and enzyme formation in plants and fungi.
• Compatible with fertilizers and other soil amendments in mixed media.

How should I use this gypsum for gardens, lawns, or mushroom substrates?

Application rates vary by use: small lawn patches and garden beds accept light broadcast applications, while mushroom substrates benefit from precise incorporation into bulk mixes. Always mix evenly into the topsoil or substrate to ensure uniform benefits.

• Garden beds: lightly broadcast and work into the top 4–6 inches of soil.
• Lawns: apply to problem areas and rake in for faster integration.
• Mushroom substrate: weigh and blend gypsum into bulk substrate recipes before pasteurization or sterilization.

Will using this gypsum change my soil pH or interact with other soil additives?

Gypsum provides calcium and sulfur without substantially shifting soil pH, making it useful when you want nutrients but not a lime-like pH increase. It works well alongside compost, lime (if pH needs adjustment), and standard fertilizers, but compatibility checks are recommended for specialized nutrient programs.

• Does not significantly raise or lower pH, unlike agricultural lime.
• Safe to combine with most organic and mineral fertilizers.
• Compatible with common substrate sterilization and conditioning practices.

Who is this for: Olympus Myco 97% Pure Gypsum Powder is aimed at home gardeners repairing heavy or compacted soils, homeowners fixing small lawn trouble spots, and small-scale mushroom cultivators needing a high-purity, soluble gypsum to refine substrate texture and nutrient balance. If you want a single-pound, easy-to-handle supply that dissolves predictably and integrates into mixes without altering pH substantially, this product fits those needs.

• Features:
  • Improves Soil & Substrate Structure: Prevents compaction and enhances air circulation for healthier roots and mushroom mycelium. Ideal for gardens, lawns, and grow operations.
  • Boosts Plant and Mushroom Growth: High-purity gypsum for gardening delivers essential calcium and sulfur while maintaining a balanced pH for vibrant, thriving plants.
  • Enhances Water Retention: Promotes even moisture distribution, helping soil and substrate stay hydrated without becoming oversaturated or soggy.
  • Reduces Clumping & Improves Texture: Our garden gypsum loosens soil and substrate for better airflow, stronger root development, and healthier mushroom cultivation.
  • Solution-Grade Purity (97%-99%): Premium gypsum soil amendment rich in calcium sulfate dihydrate to improve soil structure, reduce erosion, and support robust growth.