Water Soluble Potassium

  • Di-Potassium Phosphate 0-41-54

    Di-Potassium Phosphate 0-41-54

    Acid-free phosphate fertilizer for Nutrigation and foliar application   Soil pH is...

    Di-Potassium Phosphate 0-41-54

  • Haifa GrowClean potassium polyphosphate

    Haifa GrowClean potassium polyphosphate

    Haifa GrowClean™ - Sodium free phosphate fertilizer with cleaning effect Keeping the...

    Haifa GrowClean potassium polyphosphate

  • MagPhos

    MagPhos

    MagPhos 0-55-18+4.2Mg is a Nitrogen-free, white crystalline, fully soluble, free-flowing Magnesium fertigation...

    MagPhos

  • Mono-Potassium Phosphate 0-52-34

    Mono-Potassium Phosphate 0-52-34

    Mono-Potassium Phosphate (MKP) 0-52-34 FertilizerMKP is the most concentrated straight fertilizer containing...

    Mono-Potassium Phosphate 0-52-34

  • PeKacid 0-60-20

    PeKacid 0-60-20

    PeKacid 0-60-20 is ICL SF’s patented water-soluble PK fertilizer which is ideal...

    PeKacid 0-60-20

  • Potassium Chloride 4 lb.

    Potassium Chloride 0-0-60

    Potassium Chloride 0-0-60

  • Potassium Hydroxide

    Potassium Hydroxide

    Potassium hydroxide flake, caustic potash 0-0-75 FERTILIZER GRADE Hazardous material, CORROSIVE Produced...

    Potassium Hydroxide

  • Potassium Magnesium Sulfate — Water Soluble Potassium Source

    Potassium Magnesium Sulfate — Water Soluble Potassium Source

    Potassium Magnesium Sulfate (KMS) — Natural Chloride-Free Potassium Source Potassium magnesium sulfate...

    Potassium Magnesium Sulfate — Water Soluble Potassium Source

  • Potassium Nitrate 20 lb.

    Potassium Nitrate – Water Soluble Potassium Source

    Potassium Nitrate (KNO3) – Water Soluble Potassium SourcePotassium nitrate provides an ideal...

    Potassium Nitrate – Water Soluble Potassium Source

  • Potassium Silicate

    Potassium Silicate

    AgSil® Potassium Silicate: Soluble Silicate for Agriculture AgSil® potassium silicate offers growers...

    Potassium Silicate

  • Potassium Sulfate — Water Soluble Potassium Source

    Potassium Sulfate — Water Soluble Potassium Source

    Potassium Sulfate (SOP) — Chloride-Free Water-Soluble Potassium for Hydroponics & Fertigation Potassium...

    Potassium Sulfate — Water Soluble Potassium Source

Water-Soluble Potassium Fertilizers

Potassium is essential for water regulation, enzyme activation, sugar transport, and overall crop quality. Custom Hydro stocks the purest water-soluble potassium sources available for professional fertigation, hydroponic, and foliar programs.

Potassium Sources Available

  • Potassium sulfate (SOP) — chloride-free K with sulfur, available in 0-0-50, 0-0-51, 0-0-52, and 0-0-53 analyses depending on grade and brand
  • Potassium nitrate (KNO3 13-0-46) — chloride-free K with nitrate-N
  • Mono-potassium phosphate (MKP 0-52-34) — K with phosphorus, lowest salt index
  • PeKacid 0-60-20 — acidifying K+P source for high-pH water
  • Potassium chloride (MOP 0-0-61) — high-analysis K for non-sensitive crops
  • Potassium silicate — K with bioavailable silicon

Key Features

  • 100% water-soluble — compatible with all fertigation and hydroponic systems
  • Chloride-free options for sensitive crops and closed-loop systems
  • Near-zero sodium options (Haifa Multi-K RECI) for recirculating hydroponics
  • Multiple K forms for precise nutrient and pH management

Ideal Applications

  • Hydroponic nutrient solutions
  • Fertigation: drip, micro-jet, center pivot, sprinklers
  • Foliar spray programs
  • Soluble NPK blends and liquid fertilizer production
  • Potassium Carbonate 20lb.
    Potassium Carbonate 0-0-57 | 20 lb
    Potassium Carbonate 0-0-57 | 20 lb
    $77.10
    $0.00 $77.10
  • Haifa DKP 0-41-54 water soluble fertiizer Haifa DKP 0-41-54 fertilizer 50 lb.
    Haifa DKP 0-40-53 fertilizer 50 lb.
    Grower Price
    Haifa DKP 0-40-53 fertilizer 50 lb.
    $179.55
    $224.10 $179.55
    Grower Price
  • DKP 0-41-54 fertilizer 1 lb. DKP 0-41-54 fertilizer 1 lb.
    DKP 0-41-54 fertilizer 1 lb.
    DKP 0-41-54 fertilizer 1 lb.
    $15.08
    $0.00 $15.08
  • SoluPotasse fertilizer bag on a white background Video introduction to Solupotasse potassium sulfate fertilizer
    SoluPotasse® SOP 0-0-51 | 55 lb
    SoluPotasse® SOP 0-0-51 | 55 lb
    $82.33
    $82.33
    $1.49 lb
  • Potassium Carbonate 1lb.
    Potassium Carbonate 0-0-57 | 1 lb
    Potassium Carbonate 0-0-57 | 1 lb
    $10.85
    $0.00 $10.85
  • Bag of Haifa SOP Bio Sulfate of Potash fertilizer on a white background Haifa SOP BIO Organic 0-0-52 55 lb
    Haifa SOP BIO Organic 0-0-52 55 lb
    Grower Price
    Haifa SOP BIO Organic 0-0-52 55 lb
    $40.97
    $60.00 $40.97
    $0.74 lb
    Grower Price
  • MagPhos 0-55-18 fertilizer 1 lb.
    MagPhos 0-55-18 fertilizer 1 lb.
    MagPhos 0-55-18 fertilizer 1 lb.
    $13.50
    $0.00 $13.50
  • Agrihusta ORGANIC 3-0-9 Potassium-Nitrate fertilizer (5 GAL) Multiple containers of AgriHusta liquid complex fertilizers with green labels.
    AgriHusta Organic Liquid Fertilizer NPK 3-0-9 (Potassium Nitrate)...
    Grower Price
    AgriHusta Organic Liquid Fertilizer NPK 3-0-9 (Potassium Nitrate)...
    $67.00
    $109.84 $67.00
    $12.69 gal
    Grower Price
  • Diamond K Solution Grade Ultra Fines Sulfate Of Potash 0-0-50 Sulfate of Potash Ultra Fines | 0-0-50 | 50 lb
    Sulfate of Potash Ultra Fines | 0-0-50 |...
    Grower Price
    Sulfate of Potash Ultra Fines | 0-0-50 |...
    $47.88
    $51.00 $47.88
    $0.96 lb
    Grower Price
  • AgSil 25, 55 gallon potassium silicate fertilizer
    AgSil 25 Potassium Silicate Fertilizer 55 Gallon
    Grower Price
    AgSil 25 Potassium Silicate Fertilizer 55 Gallon
    $1,591.00
    $2,500.75 $1,591.00
    Grower Price
  • AgSil 21, 55 gallon potassium silicate fertilizer AgSil 21 soluble silicon fertilizer.
    AgSil 21 Potassium Silicate 55 Gallon
    Grower Price
    AgSil 21 Potassium Silicate 55 Gallon
    $2,141.55
    $2,672.92 $2,141.55
    Grower Price

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