






🌿 Elevate your garden game with pure gypsum power—because your plants deserve the best!
Olympus Myco 97% Pure Gypsum Powder is a premium calcium sulfate dihydrate soil amendment designed to improve soil structure, enhance water retention, and boost plant and mushroom growth. With industrial-grade purity and proven effectiveness, it prevents soil compaction, promotes healthy root development, and balances pH for vibrant gardens, lawns, and mushroom cultivation.







| Best Sellers Rank | #6,216 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #290 in Garden Fertilizers |
| Brand | Olympus Myco |
| Customer Reviews | 4.8 out of 5 stars 613 Reviews |
| Item Weight | 1 Pounds |
| Style | Industrial |
| UPC | 810102551542 |
B**Y
"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.
C**.
Supplement, fine powder
Use for mushroom growing.
E**T
GREAT!
GREAT!
V**S
10 of 10
Works wonders even if you make a lot of mistakes
J**Q
Quality Product
It is pricey and most people wouldn't buy and use like I do. If I am going to go to all the work to eliminate heavy metal and other stuff. Why use mined gypsum.
P**S
Results Take Time
I’m using gypsum to break up clay soil, and it takes more than a few weeks to see results. Asking for a review at this time is inappropriate.
S**V
Great price
Works well for my gardening needs. Great price, will definitely be back fore more. This is my second time purchasing and I'll keep coming back.
A**N
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
Trustpilot
1 month ago
1 month ago