• Red and white bag of Diamond K KMS ultrafines fertilizer on a white background
  • Backview of bag of KMS potassium magnesium sulfate with red and white design on a white background
  • Description

Diamond K KMS UltraFines Potassium Magnesium Sulfate — 50 lb

Diamond K KMS UltraFines is a premium, OMRI-certified natural source of three essential plant nutrients — 22% potassium (K), 11% magnesium (Mg), and 22% sulfur (S) — derived from langbeinite, a naturally occurring mineral mined in the USA. The ultra-fine particle size ensures rapid, complete dissolution in water, making Diamond K KMS the preferred potassium-magnesium-sulfur source for professional hydroponic and fertigation programs.

One gram dissolved in one gallon of water yields 48 ppm potassium, 29 ppm magnesium, and 58 ppm sulfur. By addressing potassium, magnesium, and sulfur simultaneously, Diamond K KMS eliminates the need for separate magnesium and sulfur inputs in most nutrient programs.

Key Features

  • 22% potassium (K) — chloride-free potassium source; safe for sensitive crops
  • 11% magnesium (Mg) — essential for chlorophyll production and enzyme activation
  • 22% sulfur (S) — sulfate form; immediately plant-available
  • Ultra-fine particle size — rapid, complete dissolution with no residue
  • OMRI certified organic — approved for use in certified organic production
  • Three nutrients in one — eliminates need for separate Mg and S inputs

Applications

  • Hydroponic and soilless nutrient programs
  • Fertigation and drip irrigation systems
  • Magnesium and sulfur supplementation in K-P-K programs
  • Organic crop production (OMRI certified)
  • Chloride-sensitive crops — berries, specialty crop, tobacco, vegetables

Specifications

  • Analysis: 0-0-22 + 11% Mg + 22% S
  • Potassium (K): 22% | Potassium (K₂O): 26%
  • Magnesium (Mg): 11%
  • Sulfur (S): 22% sulfate
  • Dilution: 1g/gallon yields 48 ppm K, 29 ppm Mg, 58 ppm S
  • Grade: UltraFines
  • Certification: OMRI Listed for organic use
  • Size: 50 lb
  • Brand: Diamond K
  • Country of Origin: USA
  • SKU: DKG-KMS-ULTFNE-50lb

Documentation

Diamond K KMS UltraFines Potassium Magnesium Sulfate 50 lb

Diamond K KMS UltraFines Potassium Magnesium Sulfate 50 lb

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$44.25
$95.00 $44.25
$0.89 lb
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What Makes Us Different

At the leading edge of the market, Custom Hydro stands out by providing the growing industry with fertilizers that are not only of premium quality but also feature innovative
solutions tailored for the unique needs of hydroponic and organic farming practices.

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    Never Compromise on the Quality of Inputs.

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