Fertilizers

  • Amendments & Growing Media

    Amendments

    Soil Amendments & Growing MediaHealthy soil and growing media are the foundation...

    Amendments

  • BioStimulants

    BioStimulants

    Plant Biostimulants & Growth EnhancersBiostimulants are substances and microorganisms that improve plant...

    BioStimulants

  • YaraLiva CalciNit 15.5-0-0 greenhouse/solution grade 50 lb bag front label

    Specialty Crop Fertilizers

    Professional-Grade Fertilizers Formulated for Specialty Crops Give your plants the precise nutrition...

    Specialty Crop Fertilizers

  • Foliar Fertilizer Supplies

    Foliar Fertilizers & Spray Supplies

    Shop foliar fertilizers, soluble nutrients, biostimulants, and spray adjuvants for professional greenhouse,...

    Foliar Fertilizers & Spray Supplies

  • Liquid Fertilizers

    Liquid Fertilizers

    Blended Liquid Fertilizer ConcentratesLiquid fertilizer concentrates offer convenience and precision for hydroponic,...

    Liquid Fertilizers

  • Organic Fertilizers

    Organic Fertilizers

    Dry Organic & Natural Mineral FertilizersCustom Hydro stocks a full range of...

    Organic Fertilizers

  • Schedule Consultation

    Schedule Consultation

    Schedule a Fertilizer & Hydroponics ConsultationGet expert, one-on-one guidance from Custom Hydro...

    Schedule Consultation

  • Preservatives

    Stock Solution Preservatives

    Preservatives for Fertilizer Solutions & Hydroponic ReservoirsMicrobial contamination in fertilizer stock solutions...

    Stock Solution Preservatives

  • Water Soluble Fertilizers

    Water Soluble Fertilizers

    Shop water-soluble fertilizer ingredients and blended formulas for building a crop nutrition...

    Water Soluble Fertilizers

Shop water-soluble, liquid and organic fertilizers, amendments and biostimulants for commercial greenhouse, nursery, field and market-garden production. Find crop nutrition options for hydroponics, fertigation, foliar feeding and soil-based growing.

Browse the categories below by fertilizer type, crop or application. Compare nutrient analyses, fertilizer grades and package sizes on individual product pages, and choose products around your crop requirements, water quality and growing media. Organic-use listings, mixing guidance and application directions are product-specific.

  • JR Croptech Vegetative Mix 9-17-28 Water Soluble Fertilizer - 25 Pound JR Croptech Vegetative fertilizer fine powder
    JR Croptech Vegetative Mix 9-17-28 Water Soluble Fertilizer...
    Grower Price
    JR Croptech Vegetative Mix 9-17-28 Water Soluble Fertilizer...
    $93.10
    $157.50 $93.10
    $3.72 lb
    Grower Price
  • 10% Iron DTPA chelated fertilizer 1 lb.
    10% Iron DTPA chelated fertilizer 1 lb.
    10% Iron DTPA chelated fertilizer 1 lb.
    $18.50
    $0.00 $18.50
    $18.50 lb
  • ICL PeaK MKP 1 lb. MKP Mono-Potassium Phosphate 1 lb
    MKP Mono-Potassium Phosphate 1 lb
    Grower Price
    MKP Mono-Potassium Phosphate 1 lb
    $8.48
    $16.96 $8.48
    $8.48 lb
    Grower Price
  • Potassium Silicate Fertilizer 20 lb. AgSil 16H Potassium Silicate 20 lb
    AgSil 16H Potassium Silicate 20 lb
    Sold out
    AgSil 16H Potassium Silicate 20 lb
    $156.00
    $179.85 $156.00
    $7.80 lb
    Sold out
  • Magnesium Sulfate 4 lb.
    Magnesium Sulfate 4 lb.
    Magnesium Sulfate 4 lb.
    $6.21
    $0.00 $6.21
    $1.55 lb
  • Ferti-Fulvic Plus 90% Fulvic Acid 50 lb. Ferti-Fulvic Plus 90% Fulvic Acid - 50 lb
    Ferti-Fulvic Plus 90% Fulvic Acid - 50 lb
    Grower Price
    Ferti-Fulvic Plus 90% Fulvic Acid - 50 lb
    $226.90
    $383.40 $226.90
    $4.54 lb
    Grower Price
  • Ferti-Organic Soluble Fulvic Acid 69% - 1 lb Ferti-Organic Soluble Fulvic Acid 69% - 1 lb
    Ferti-Organic Soluble Fulvic Acid 69% - 1 lb
    Ferti-Organic Soluble Fulvic Acid 69% - 1 lb
    $13.40
    $0.00 $13.40
    $13.40 lb
  • Sodium Molybdate 1 lb.
    Sodium Molybdate 1 lb.
    Grower Price
    Sodium Molybdate 1 lb.
    $53.15
    $63.78 $53.15
    $53.15 lb
    Grower Price
  • Ferti-Nitro Plus 13.62-0-0 Organic Fertilizer 50 lb. Ferti-Nitro Plus Organic Nitrogen 13.62-0-0 - 50 lb
    Ferti-Nitro Plus Organic Nitrogen 13.62-0-0 - 50 lb
    Grower Price
    Ferti-Nitro Plus Organic Nitrogen 13.62-0-0 - 50 lb
    $322.62
    $401.80 $322.62
    $6.45 lb
    Grower Price
  • Solubor boron fertilizer 20.5% B 1 lb resealable jar with Custom Hydro Nutrients logo Solubor boron fertilizer 1 lb.
    Solubor Boron Fertilizer | 20.5% B 1 lb
    Solubor Boron Fertilizer | 20.5% B 1 lb
    $11.55
    $0.00 $11.55
    $11.55 lb
  • Solubor boron fertilizer 20.5% B 4 lb white resealable screw-top jar with Custom Hydro Nutrients logo Solubor boron fertilizer 4 lb.
    Solubor Boron Fertilizer | 20.5% B 4 lb
    Solubor Boron Fertilizer | 20.5% B 4 lb
    $21.40
    $0.00 $21.40
    $5.35 lb
  • Manganese EDTA chelate 13% Mn 1 lb resealable screw-top jar with Custom Hydro Nutrients logo Manganese EDTA 13% 1 lb.
    Manganese EDTA Chelate | 13% Mn 1 lb
    Manganese EDTA Chelate | 13% Mn 1 lb
    $15.20
    $0.00 $15.20
    $15.20 lb
  • Magnesium Sulfate 20 lb. Custom Hydro Magnesium Sulfate (Epsom Salt) water soluble fertilizer 20 lb pail
    Magnesium Sulfate Heptahydrate (Epsom Salt) - 20 lb
    Magnesium Sulfate Heptahydrate (Epsom Salt) - 20 lb
    $14.50
    $0.00 $14.50
    $0.73 lb
  • Metalosate MultiMineral Organic 5 lb amino acid chelated foliar fertilizer jug USDA organic Metalosate Multimineral fertilizer packaging with images of fruits and vegetables on a white background
    Metalosate MultiMineral Organic 5 lb.
    Grower Price
    Metalosate MultiMineral Organic 5 lb.
    $100.70
    $151.42 $100.70
    $20.14 lb
    Grower Price
  • Sodium Molybdate 8 oz.
    Sodium Molybdate 8 oz.
    Grower Price
    Sodium Molybdate 8 oz.
    $36.40
    $48.00 $36.40
    Grower Price
  • Cobalt Sulfate, 1 lb
    Cobalt Sulfate, 1 lb
    Cobalt Sulfate, 1 lb
    $33.40
    $0.00 $33.40
    $33.40 lb

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