97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate

Seems good quality and legit. It didn't kill my 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.

Worked well for mixing!

While not the cheapest, it is hard to find this quality at anything less then $10 a pound, and being that it was entirely clean of contamination I’d say it is absolutely worth the price, especially when growing gourmets in which is a food safety concern with some brands.

Wonderful product, we use it to make our own primer. Just make sure that I'd you store it outside of the bag it comes in, you label it well! Someone in the shop mistook it for citric acid.

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.

Fast service, lab quality

Its gypsum. Nothing wrong with it! Good price.