---
product_id: 533998735
title: "97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate"
brand: "olympus myco"
price: "$45"
currency: NZD
in_stock: true
reviews_count: 8
category: "Olympus Myco"
url: https://www.desertcart.nz/products/533998735-97-pure-gypsum-powder-1-lb-high-solubility-calcium-sulfate
store_origin: NZ
region: New Zealand
---

# Enhances root oxygenation & water retention High solubility ensures rapid nutrient release 97%+ purity for premium soil health 97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate

**Brand:** olympus myco
**Price:** $45
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your garden game with pure, powerful gypsum!

## Quick Answers

- **What is this?** 97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate by olympus myco
- **How much does it cost?** $45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/533998735-97-pure-gypsum-powder-1-lb-high-solubility-calcium-sulfate)

## 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

- • **Trusted by Garden Pros:** Top-rated with 4.8 stars and a bestseller in garden fertilizers.
- • **Optimized Moisture Balance:** Promotes even hydration without sogginess, perfect for gardens and mushroom substrates.
- • **Pure Calcium & Sulfur Boost:** Delivers essential nutrients with 97%+ purity to fuel vibrant plant growth.
- • **Clump-Free, Easy Application:** Loosens soil texture for effortless mixing and healthier cultivation.
- • **Unlock Superior Soil Structure:** Prevents compaction and boosts airflow for thriving roots and mushroom mycelium.

## Overview

Olympus Myco 97% Pure Gypsum Powder is a high-solubility calcium sulfate dihydrate soil amendment designed to improve soil and substrate structure, enhance water retention, and provide essential calcium and sulfur nutrients. Ideal for gardens, lawns, and mushroom cultivation, this 1 lb pack offers premium purity and proven results, making it a top choice for professional and hobbyist growers alike.

## Description

desertcart.com : Olympus Myco 97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate : Patio, Lawn & Garden

Review: "Tomato" plants. - I recently started using gypsum powder in my garden, and I'm pretty impressed. It's way cheaper than other soil amendments I've tried. I noticed a real difference in my plants' growth, especially my tomatoes. They seem healthier and more productive. The powder is easy to mix into the soil, and it doesn't have a strong smell. Plus, it's a natural product, so I feel good about using it. I'd definitely recommend giving it a try if you're looking to improve your soil.
Review: Gypsum - Food grade gypsum I use in my CVG mixture. Nice size bag, excellent for water retention in mycology. Easy to use, and pest free

## 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 | #3,845 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #176 in Garden Fertilizers |
| Customer Reviews | 4.8 4.8 out of 5 stars (594) |
| Item Weight | 1 pounds |
| Item model number | 1 lb |
| Manufacturer | Olympus Myco |
| Package Dimensions | 8.62 x 6.02 x 2.36 inches |

## Product Details

- **Brand:** Olympus Myco
- **Item Weight:** 16 ounces
- **Style:** Industrial
- **UPC:** 810102551542

## Images

![97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate - Image 1](https://m.media-amazon.com/images/I/71jCl3PWjjL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ "Tomato" plants.
*by B***Y on May 5, 2025*

I recently started using gypsum powder in my garden, and I'm pretty impressed. It's way cheaper than other soil amendments I've tried. I noticed a real difference in my plants' growth, especially my tomatoes. They seem healthier and more productive. The powder is easy to mix into the soil, and it doesn't have a strong smell. Plus, it's a natural product, so I feel good about using it. I'd definitely recommend giving it a try if you're looking to improve your soil.

### ⭐⭐⭐⭐⭐ Gypsum
*by A***N on October 10, 2025*

Food grade gypsum I use in my CVG mixture. Nice size bag, excellent for water retention in mycology. Easy to use, and pest free

### ⭐⭐⭐⭐⭐ GREAT!
*by E***T on January 4, 2026*

GREAT!

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-16*