--- product_id: 664482762 title: "Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure" brand: "olympus myco" price: "251.60 DT" currency: TND in_stock: true category: "Olympus Myco" url: https://www.desertcart.tn/products/664482762-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-garden store_origin: TN region: Tunisia --- # Optimized water retention 97%-99% purity gypsum Prevents soil compaction Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure **Brand:** olympus myco **Price:** 251.60 DT **Availability:** ✅ In Stock ## Summary > 🌱 Elevate your grow game with lab-grade gypsum—because your mushrooms deserve the best! ## Quick Answers - **What is this?** Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure by olympus myco - **How much does it cost?** 251.60 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/664482762-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-garden) ## Best For - olympus myco enthusiasts ## Why This Product - Trusted olympus myco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Growth Catalyst:** Delivers essential calcium and sulfur nutrients that turbocharge plant and mushroom vitality. - • **Airflow Amplifier:** Loosens soil and substrate to boost oxygen flow, fueling stronger roots and vibrant mycelium. - • **Hydration Harmony:** Enhances moisture distribution to keep your soil perfectly balanced—never soggy, never dry. - • **Premium Purity Power:** Lab-grade gypsum with 97%-99% calcium sulfate dihydrate for unmatched substrate quality. - • **Clean & Controlled Packaging:** Sealed in a HEPA enclosure to guarantee contamination-free, professional-grade gardening. ## Overview Olympus Myco Gypsum Powder is a premium, lab-grade calcium sulfate dihydrate soil amendment designed to improve substrate structure, enhance water retention, and boost oxygen flow. Packaged in a HEPA enclosure, it delivers 97%-99% purity to support robust mushroom and plant growth by supplying essential calcium and sulfur nutrients while preventing soil compaction and clumping. ## Description Product Description Olympus Myco premium-grade gypsum powder is a vital ingredient in creating the ideal substrate for mushroom cultivation. It is also a rich source of calcium and sulfur, which are essential nutrients for healthy mushroom growth. Additionally, our gypsum powder improves water retention, regulates moisture levels, and prevents clumping, resulting in better air circulation. Our solution grade gypsum is a high-purity form of gypsum that is finely ground and designed to quickly dissolve in water. It is an ideal soil amendment that can improve soil structure, reduce soil erosion, and supply essential nutrients such as calcium and sulfur to plants and mushrooms. In addition, solution grade gypsum can be used in industrial processes as a source of calcium and sulfur. Whether you're a beginner or an experienced mushroom cultivator, our gypsum powder is an essential component of your mushroom growing kit, helping to promote robust and healthy mushrooms. Safety Warning Use with care. Avoid inhalation and contact with eyes and skin. Do not ingest. Use with gloves and protective mask. Keep out of reach of children and pets. Do not use on edible crops without dilution and proper precautions. ## 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0C5K2SSP1 | | Best Sellers Rank | 360,345 in Garden ( See Top 100 in Garden ) 4,610 in Garden Fertilisers | | Brand Name | Olympus Myco | | Customer Reviews | 4.8 4.8 out of 5 stars (627) | | Included Components | gypsum 1 lb | | Item Weight | 454 g | | Manufacturer | Olympus Myco | | Manufacturer Part Number | OM-GYPSUM1LB | | Model Number | 1 lb | | Number of Packs | 1 | | Style Name | Industrial | | UPC | 810102551542 | | Unit Count | 16.0 gram | | Volume | 1 Litres | ## Product Details - **Brand:** Olympus Myco - **Item weight:** 454 g - **Number of Packs:** 1 - **Style:** Industrial - **UPC:** 810102551542 ## Images ![Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure - Image 1](https://m.media-amazon.com/images/I/71jCl3PWjjL.jpg) ![Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure - Image 2](https://m.media-amazon.com/images/I/41WffONpYGL.jpg) ![Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure - Image 3](https://m.media-amazon.com/images/I/41rMHdadH-L.jpg) ![Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure - Image 4](https://m.media-amazon.com/images/I/51hkUDUPcKL.jpg) ![Gypsum Powder for Mushroom Substrate (1 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure - Image 5](https://m.media-amazon.com/images/I/41eWcILh4OL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Olympus Myco 97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate - Coco Coir 650gm Bricks (5-Pack) - Organic Coco Coir for Plants & Gardening - OMRI-Listed Cocopeat for Garden Soil, Seed Starter Soil, & Mulch - Organic Coconut Bricks - Coconut Fiber Potting Mix - 10QT Horticultural Vermiculite Bulk, Organic Vermiculite for Plants, Course Grade Vermiculite for Gardening, for houseplants, for Mushrooms, to Maintain Soil Moisture and Plant Growth(2-4mm) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/664482762-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-garden](https://www.desertcart.tn/products/664482762-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-garden) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-20*