Item Number: F1153
Diamond K Solution Grade Gypsum (50 lb)
Organic-Friendly Gypsum Powder for Improved Soil Health
Improve soil structure, enhance water infiltration, and promote plant health with Diamond K gypsum powder—a high-purity, ultra-fine powdered gypsum ideal for home gardens and certified organic farms.
This 50 lb bag contains 97% pure calcium sulfate dihydrate (22% calcium, 18% sulfur). The fine particle size (92% passing through a 325-mesh screen) ensures quick solubility for dry applications, soil drenches, or fertigation systems.
Key Benefits:
- Loosens Compacted Soils: Breaks up clay and heavy soils for better aeration and root development.
- Improves Water Management: Increases both drainage and moisture retention in poorly draining soils.
- Boosts Soil Fertility: Supplies essential nutrients that support plant metabolism and beneficial microbial activity.
- Certified Organic: OMRI-listed and free of synthetic additives, making it ideal for sustainable gardening.
Application Guidelines:
- Garden Beds: 5–10 lbs per 100 sq. ft.
- Container Plants: 1–2 tablespoons dissolved in 5 gallons of water.
- Field Use: 50–400 lbs per acre (soil); 1–10 lbs per acre (foliar spray).
Diamond K powdered gypsum is a fast-acting, easy-to-apply solution for loosening soil, improving water movement, and increasing nutrient availability. Its high purity and solubility make it a reliable soil amendment for gardeners, landscapers, and organic growers.
Complete your soil health program with our full range of natural and organic fertilizers for sale and soil amendments.



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Does not qualify for Flat Rate Shipping.
Shipping Weight: 52.0 lb
Dimensions: 21.5"L x 15.5"W x 5.5"H
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Use Instructions
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It seems to work great on my ginger by providing the Calcium without raising the pH. And it was a great price too!
We’ve purchased many amendments from this company and they are all awesome! We are extremely pleased with how happy our plants are now that we are feeding them! We Highly recommend them!
Its Nice quality gypsum. Mushrooms seem to be doing very well.
I have been using this product for about 3 years now to clear up muddy pond water and it works wonders making water crystal clean. Have not found anything else I've tried as good and economically priced as this and peaceful valley gets it out right away all the way to Mississippi. Happy with their service
I know this product has alot of uses but I've been using it to clear up the water in my new pond until I get some grass growing around it. Every time we have a big rain it washes this red clay into it and kinda muddied or clouds up thr water to where my fish can't see how to eat. They are sight feeders and this product is harmless to fish and it works great. Better than anything I've tried and have used it a few times. My biggest problem is I'm in Mississippi & it's in California. I can't find it anywhere else and st a price I can afford. I love it. Really does the job