223
people found this helpful, as of 2023
ranked #136,206 most helpful
out of 571,544,897 reviews
★★★★★
Happy plants, happy gardener.
Due to poor soil quality my garden was struggling. No matter what I did growth was mediocre and plants kept dying. I chose to have my soil tested and amongst other things I found that it was calcium deficient. After researching what to add to my soil I ordered this 6 lb. bag of horticultural gypsum from Amazon. The bag is roughly 7"x 7"x 4" in size and contains a bit over 3 quarts. The chemical breakdown on the side of the bag says:
Calcium sulfate 68%
Calcium sulfate dehydrate 86%
Calcium 20%
Sulfur 16%
I mixed a few bags into my soil at the recommended rate and after a few more amendments my plants are super happy and so am I!
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April 2016 · Patio Lawn and Garden · verified purchase