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.

  • YaraLiva CalciNit 15.5-0-0 greenhouse/solution grade 50 lb bag front label Close-up of YaraLiva CalciNit white calcium nitrate granular prills
    YaraLiva CalciNit 15.5-0-0 | 50 lb
    Grower Price
    YaraLiva CalciNit 15.5-0-0 | 50 lb
    $37.25
    $56.02 $37.25
    $0.75 lb
    Grower Price
  • Magriculture Magnesium Sulfate 50 lb. bag. Magriculture Magnesium Sulfate Heptahydrate 50 lb
    Magriculture Magnesium Sulfate Heptahydrate 50 lb
    Magriculture Magnesium Sulfate Heptahydrate 50 lb
    $28.86
    $28.86
    $0.58 lb
  • MasterBlend 4-18-38 Tomato Formula 25 lb. A closeup view of a small pile of MasterBlend 4-18-38 hydroponic tomato fertilizer powder.
    MasterBlend 4-18-38 Tomato Formula 25 lb.
    Grower Price
    MasterBlend 4-18-38 Tomato Formula 25 lb.
    $48.00
    $72.18 $48.00
    $1.92 lb
    Grower Price
  • MasterBlend 0-12-24 Bloom Formula 25 lb. A closeup view of MasterBlend 0-20-42 Cannabis Bloom, a free flowing non-clumping powder fertilizer.
    MasterBlend 0-20-42 Bloom Formula 25 lb.
    Grower Price
    MasterBlend 0-20-42 Bloom Formula 25 lb.
    $46.59
    $84.25 $46.59
    $1.86 lb
    Grower Price
  • ICL PeaK MKP 0-52-34 fertilizer 50 lb. BAG ICL PeaK MKP 0-52-34 fertilizer logo
    ICL PeaK MKP 0-52-34 Fertilizer 50 lb
    Grower Price
    ICL PeaK MKP 0-52-34 Fertilizer 50 lb
    $80.45
    $110.00 $80.45
    $1.61 lb
    Grower Price
  • MasterBlend 8-15-36 Lettuce Formula 25 lb water-soluble hydroponic fertilizer bag Masterblend fertilizer container in a greenhouse with rows of lettuce plants
    MasterBlend 8-15-36 Lettuce Formula 25 lb.
    Grower Price
    MasterBlend 8-15-36 Lettuce Formula 25 lb.
    $63.54
    $79.30 $63.54
    $2.54 lb
    Grower Price
  • Peters Professional 5-11-26 Hydroponic Special fertilizer 25 lb. European bag. An example of the Peters Professional Hydroponic Special 5-11-26 soluble fertilizer powder.
    Peters Professional 5-11-26 Hydroponic Special Fertilizer - 25...
    Grower Price
    Peters Professional 5-11-26 Hydroponic Special Fertilizer - 25...
    $51.51
    $84.32 $51.51
    $2.06 lb
    Grower Price
  • ICL PeaK MKP 4 lb. MKP Mono-Potassium Phosphate 4 lb
    MKP Mono-Potassium Phosphate 4 lb
    Grower Price
    MKP Mono-Potassium Phosphate 4 lb
    $18.66
    $37.00 $18.66
    $4.67 lb
    Grower Price
  • AgSil 16H Potassium Silicate fertilizer 50 lb. AgSil 16h soluble potassium silicate
    AgSil 16H Potassium Silicate 50 lb
    Sold out
    AgSil 16H Potassium Silicate 50 lb
    $337.16
    $507.00 $337.16
    $6.74 lb
    Sold out
  • Haifa MKP 0-52-34 monopotassium phosphate fertilizer 55 lb bag — pink label with QR code on white background Haifa MKP monopotassium phosphate powder close-up — pure white water-soluble fertilizer crystals
    Haifa Monopotassium Phosphate MKP 0-52-34 55 lb
    Grower Price
    Haifa Monopotassium Phosphate MKP 0-52-34 55 lb
    $90.21
    $99.00 $90.21
    $1.64 lb
    Grower Price
  • JR Croptech Flower Mix 0-21-26 Water Soluble Fertilizer - 25 Pound BAG A closeup view of JR Croptech Flower powder fertilizer mix.
    JR Croptech Flower Mix 0-21-26 Water Soluble Fertilizer...
    Grower Price
    JR Croptech Flower Mix 0-21-26 Water Soluble Fertilizer...
    $93.10
    $135.00 $93.10
    $3.72 lb
    Grower Price
  • Chelated Micronutrient Mix 1 lb.
    Chelated Micronutrient Mix 1 lb.
    Chelated Micronutrient Mix 1 lb.
    $20.42
    $0.00 $20.42
    $20.42 lb
  • Haifa SOP GG 0-0-51 55 lb. Haifa SOP GG 0-0-51 55 lb.
    Haifa SOP GG 0-0-51 55 lb.
    Sold out
    Haifa SOP GG 0-0-51 55 lb.
    $44.31
    $44.31
    $0.80 lb
    Sold out
  • PureCal 13-0-0 ammonia free calcium nitrate 55 lb. PureCal 13-0-0 Calcium Nitrate | 55 lb Bag
    PureCal 13-0-0 Calcium Nitrate | 55 lb Bag
    Sold out
    PureCal 13-0-0 Calcium Nitrate | 55 lb Bag
    $40.77
    $66.00 $40.77
    $0.74 lb
    Sold out
  • Protassium+ 3IX 0-0-53 fertilizer 50 lb. Pile of white SOP 3IX 0-0-53 fertilizer powder on a white background
    Protassium+ SOP 3IX 0-0-53 Potassium Sulfate 50 lb
    Grower Price
    Protassium+ SOP 3IX 0-0-53 Potassium Sulfate 50 lb
    $60.98
    $91.70 $60.98
    $1.22 lb
    Grower Price
  • Ferti-Fulvic Plus 90% Fulvic Acid - 4 lb Ferti-Fulvic Plus 90% Fulvic Acid - 4 lb
    Ferti-Fulvic Plus 90% Fulvic Acid - 4 lb
    Ferti-Fulvic Plus 90% Fulvic Acid - 4 lb
    $32.10
    $0.00 $32.10
    $8.03 lb

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