---
product_id: 740498081
title: "Gypsum Powder for Mushroom Substrate (1 lb) | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Ultra-Fine | Soil Conditioner | (Calcium Sulfate Dihydrate)"
brand: "mushroom merchant"
price: "222.73 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Mushroom Merchant"
url: https://www.desertcart.tn/products/740498081-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-packed
store_origin: TN
region: Tunisia
---

# Ultra-fine, highly soluble powder 97% pure calcium sulfate dihydrate HEPA-filtered contamination-free packaging Gypsum Powder for Mushroom Substrate (1 lb) | Lab Grade | Packed in a HEPA-Filtered Facility | Highly Soluble for Growing Mushrooms | Ultra-Fine | Soil Conditioner | (Calcium Sulfate Dihydrate)

**Brand:** mushroom merchant
**Price:** 222.73 DT
**Availability:** ✅ In Stock

## Summary

> 🍄 Elevate your grow game with lab-grade gypsum perfection!

## Quick Answers

- **What is this?** Gypsum Powder for Mushroom Substrate (1 lb) | 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?** 222.73 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/740498081-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-packed)

## 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

- • **Proudly USA-Made Quality:** Mined, refined, and packed in the USA, delivering trusted quality at an accessible price.
- • **Contamination-Free Packaging:** Packed in a HEPA-filtered facility by expert mycologists to guarantee a sterile substrate environment.
- • **Effortless Mixing & Absorption:** Ultra-fine powder dissolves quickly for seamless integration into your substrate or soil.
- • **Lab-Grade Purity for Peak Growth:** 97% pure gypsum ensures optimal mycelium health and vigorous mushroom yields.
- • **Versatile Soil & Substrate Enhancer:** Improves soil structure and nutrient availability for both mushrooms and plants alike.

## Overview

This 1 lb pack of ultra-fine, 97% pure calcium sulfate dihydrate gypsum powder is specially formulated for mushroom cultivation and gardening. Packaged in a HEPA-filtered facility to prevent contamination, it dissolves easily for optimal substrate integration, enhancing soil structure and nutrient availability. Proudly made in the USA, it’s the trusted choice for serious growers seeking superior mushroom yields and healthier plants.

## 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 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.

Review: Quality - Hi quality
Review: Bit pricey but good - A bit pricey but I don't need a whole lot works great for mushrooms

## 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.
- [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 |
| Brand | Mushroom Merchant |
| Brand Name | Mushroom Merchant |
| Coverage | Gypsum to Substrate Ratio 1:10 |
| Customer Reviews | 4.8 out of 5 stars 150 Reviews |
| Item Form | Powder |
| Item Weight | 454 g |
| Item form | Powder |
| Item weight | 454 g |
| Liquid Volume | 16 Fluid 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 |
| Specific uses for product | Mushroom Cultivation, Gardening |
| Target Species | mushrooms |
| UPC | 198168469224 |
| Unit Count | 473.18 Milliliters |

## Product Details

- **Brand:** Mushroom Merchant
- **Item form:** Powder
- **Item weight:** 454 g
- **Liquid volume:** 16 Fluid Ounces
- **Specific uses for product:** Mushroom Cultivation, Gardening

## Images

![Gypsum Powder for Mushroom Substrate (1 lb) | 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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality
*by R***A on 24 October 2025*

Hi quality

### ⭐⭐⭐⭐⭐ Bit pricey but good
*by T***A on 29 March 2026*

A bit pricey but I don't need a whole lot works great for mushrooms

### ⭐⭐⭐⭐⭐ Worked great for mushrooms
*by A***N on 8 March 2026*

The powder dissolves well in water. I've only used a couple tablespoons so far but it's worked great. My mushrooms have grown well with it. A good value for the price.

## 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.tn/products/740498081-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-packed](https://www.desertcart.tn/products/740498081-gypsum-powder-for-mushroom-substrate-1-lb-lab-grade-packed)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-21*