---
product_id: 629842698
title: "Gypsum Powder for Mushroom Substrate | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Ultra Fine | Soil Conditioner | (Calcium Sulfate Dihydrate)"
brand: "mushroom merchant"
price: "R724"
currency: ZAR
in_stock: true
category: "Mushroom Merchant"
url: https://www.desertcart.co.za/products/629842698-gypsum-powder-for-mushroom-substrate-lab-grade-packed-in-hepa
store_origin: ZA
region: South Africa
---

# ultra-fine, highly soluble powder 97% pure calcium sulfate HEPA-filtered contamination-free packing Gypsum Powder for Mushroom Substrate | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Ultra Fine | Soil Conditioner | (Calcium Sulfate Dihydrate)

**Brand:** mushroom merchant
**Price:** R724
**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 | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Ultra Fine | Soil Conditioner | (Calcium Sulfate Dihydrate) by mushroom merchant
- **How much does it cost?** R724 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/629842698-gypsum-powder-for-mushroom-substrate-lab-grade-packed-in-hepa)

## Best For

- mushroom merchant enthusiasts

## Why This Product

- Trusted mushroom merchant brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Boosts Yield by 50%+:** Enhances soil structure and nutrient absorption, driving bigger, healthier mushroom harvests.
- • **Ultra-Fine & Highly Soluble:** Easily mixes with water for seamless substrate integration and faster mushroom colonization.
- • **Contamination-Free Packaging:** Packed in a HEPA-filtered facility by expert mycologists to guarantee a sterile substrate environment.
- • **Lab-Grade Purity for Peak Growth:** 97% calcium sulfate dihydrate ensures optimal nutrient delivery and mycelium health.
- • **Versatile Soil & Substrate Enhancer:** Perfect for mushroom cultivation, gardening, landscaping, and repairing salt-damaged soil.

## Overview

Mushroom Merchant’s Gypsum Powder is a premium, 97% pure calcium sulfate dihydrate designed specifically for mushroom substrate and soil conditioning. Packaged in a HEPA-filtered facility to eliminate contaminants, this ultra-fine, highly soluble powder improves soil structure, enhances nutrient availability, and can increase mushroom yields by over 50%. Made in the USA, it’s a versatile, affordable solution trusted by both professional mycologists and gardening enthusiasts alike.

## Description

Gypsum for mushroom substrate and soil. One pound of gypsum powder for growing mushrooms and for the garden. Gypsum (calcium sulfate dihydrate) is used to improve soil structure, make nutrients available, and much more. Packaged in a HEPA filtered facility, and is 97% pure. Designed to support vigorous mycelium growth, our gypsum powder ensures an optimal growing environment, fostering the development of abundant, healthy fruiting bodies. Whether you're a seasoned mycologist or a beginner enthusiast, our product is the key to successful mushroom cultivation projects. Unlock the full potential of your mushroom cultivation and gardening endeavors with our premium Gypsum for Mushroom Substrate and Soil. Each pound of our meticulously crafted gypsum powder is your key to vibrant mushrooms and flourishing plants. Gypsum, also known as calcium sulfate dihydrate, isn't just a soil amendment – it's a game-changer for your garden. Improve soil structure, make essential nutrients readily available to your plants, and unlock their growth potential with ease. Perfect for indoor and outdoor growing. Superior quality equals superior results. Our gypsum tested at 97% purity. Whether you're a seasoned mushroom grower or a budding green thumb, our gypsum is the perfect addition to your toolkit. Designed specifically for mushrooms and plants, our product is a must-have for any serious cultivator.

## Features

- [Mycology Grade] - Made with the mushroom grower in mind. Packaged in a HEPA filtered facility by experienced mycologists. This ensures no contaminants will enter your grow area.
- [High Purity] - 97% calcium sulfate dihydrate. Ultra fine and highly soluble in water, making it easy to mix.
- [Improves Soil Structure] - Reduces clumping and allows for better absorption of water. Gypsum also provides essential minerals for increased yield. Gypsum can also repair damage from excess salt in soil.
- [Versatile Substrate Amendment] - Use gypsum for mushroom substrate, your garden, landscaping, grain spawn, and so much more. Supports plant health and can increase yield by 50% or more when added to mushroom fruiting blocks. Best known as an essential ingredient in CVG, which is a substrate blend of coco coir, vermiculite, and gypsum.
- [Affordable Quality] - Quality you can trust at a price that doesn't break the bank. Every day, we strive to provide the most value to our customers.
- [100% USA Made] - Mined, refined, and packed proudly in the USA. Our goal is to make your growing experience easy and enjoyable.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D3V95WWZ |
| Best Sellers Rank | #29,222 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #680 in Garden Fertilizers |
| Brand | Mushroom Merchant |
| Coverage | Gypsum to Substrate Ratio 1:10 |
| Customer Reviews | 4.7 4.7 out of 5 stars (176) |
| Included Components | Instructions |
| Item Form | Powder |
| Item Weight | 16 ounces |
| Liquid Volume | 16 fluid ounces |
| Manufacturer | Mushroom Merchant |
| Mixing Ratio | 1:10 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | GYP1LBV1 |
| Specific Uses For Product | Mushroom Cultivation, Gardening |
| Target Species | mushrooms |
| UPC | 198168469224 |
| Unit Count | 16 Fluid Ounces |

## Product Details

- **Brand:** Mushroom Merchant
- **Item Form:** Powder
- **Item Weight:** 16 ounces
- **Liquid Volume:** 16 fluid ounces
- **Specific Uses For Product:** Mushroom Cultivation, Gardening

## Images

![Gypsum Powder for Mushroom Substrate | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Ultra Fine | Soil Conditioner | (Calcium Sulfate Dihydrate) - Image 1](https://m.media-amazon.com/images/I/71tW5iN-YFL.jpg)

## Available Options

This product comes in different **Item Weight** options.

## Frequently Bought Together

- Gypsum Powder for Mushroom Substrate | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Ultra Fine | Soil Conditioner | (Calcium Sulfate Dihydrate)
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**Shop now:** [https://www.desertcart.co.za/products/629842698-gypsum-powder-for-mushroom-substrate-lab-grade-packed-in-hepa](https://www.desertcart.co.za/products/629842698-gypsum-powder-for-mushroom-substrate-lab-grade-packed-in-hepa)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-10-31*