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.

  • PeKacid 0-60-20 fertilizer 4 lb.
    PeKacid 0-60-20 fertilizer 4 lb.
    PeKacid 0-60-20 fertilizer 4 lb.
    $22.00
    $0.00 $22.00
    $5.50 lb
  • peters hydroponic finisher 25 pound bag Peters Professional 0-15-30 Hydroponic Finisher - 25 lb
    Peters Professional 0-15-30 Hydroponic Finisher - 25 lb
    Grower Price
    Peters Professional 0-15-30 Hydroponic Finisher - 25 lb
    $65.64
    $102.86 $65.64
    $2.63 lb
    Grower Price
  • Magnesium Sulfate 1 lb.
    Magnesium Sulfate 1 lb.
    Magnesium Sulfate 1 lb.
    $1.85
    $0.00 $1.85
  • Hortus IBA Water Soluble Salts 0.25Kg Hortus IBA rooting hormones
    Hortus IBA | 250g
    Grower Price
    Hortus IBA | 250g
    $215.46
    $270.00 $215.46
    Grower Price
  • PeKacid 0-60-20 Fertilizer 55 lb. PeKacid 0-60-20 Fertilizer 55 lb. backside
    PeKacid 0-60-20 Fertilizer 55 lb.
    Grower Price
    PeKacid 0-60-20 Fertilizer 55 lb.
    $101.55
    $161.50 $101.55
    $1.85 lb
    Grower Price
  • Ammonium Sulfate 20 LB Ammonium Sulfate 20 LB
    Ammonium Sulfate 20 LB
    Ammonium Sulfate 20 LB
    $18.75
    $0.00 $18.75
  • Iron Sulfate Heptahydrate powder 50 lb.
    Iron Sulfate Heptahydrate Powder, 20% Iron | 50...
    Grower Price
    Iron Sulfate Heptahydrate Powder, 20% Iron | 50...
    $39.05
    $45.51 $39.05
    Grower Price
  • Hortus IBA Water Soluble Salts 100 grams Hortus IBA rooting hormones
    Hortus IBA | 100g
    Grower Price
    Hortus IBA | 100g
    $97.65
    $126.00 $97.65
    Grower Price
  • Boric acid powder 99.9% pure 4 lb resealable screw-top jar with Custom Hydro Nutrients logo Boric acid 99.9% 4 lb.
    Boric Acid Powder | 99.9% Pure 4 lb
    Boric Acid Powder | 99.9% Pure 4 lb
    $22.87
    $0.00 $22.87
  • Copper EDTA 15% 8 ounces
    Copper EDTA 15% 8 ounces
    Copper EDTA 15% 8 ounces
    $12.50
    $0.00 $12.50
  • Sprint 138 6% Iron EDDHA chelated fertilizer 5 lb.
    Sprint 138 6% Iron EDDHA chelated fertilizer 5...
    Sold out
    Sprint 138 6% Iron EDDHA chelated fertilizer 5...
    $152.29
    $229.00 $152.29
    Sold out
  • Calcium EDTA chelated 9.7% 1 lb.
    Calcium EDTA chelated 9.7% 1 lb.
    Calcium EDTA chelated 9.7% 1 lb.
    $12.26
    $0.00 $12.26
  • Ferti-Fulvic Plus 20 lb bucket mockup with Custom Hydro repack label Ferti-Fulvic Plus 90% Fulvic Acid - 20 lb
    Ferti-Fulvic Plus 90% Fulvic Acid - 20 lb
    Ferti-Fulvic Plus 90% Fulvic Acid - 20 lb
    $123.60
    $0.00 $123.60
    $6.18 lb
  • Peters Professional S.T.E.M. 25 lb. Peters Professional S.T.E.M. 25 lb.
    Peters Professional S.T.E.M. 25 lb.
    Sold out
    Peters Professional S.T.E.M. 25 lb.
    $86.20
    $129.60 $86.20
    Sold out
  • Zinc EDTA chelate 15% Zn 20 lb white pail with Custom Hydro Nutrients logo Zinc EDTA Chelate infographic — 15% Zn, chelated formula, hydroponic fertigation and foliar application rates
    Zinc EDTA Chelate | 15% Zn 20 lb
    Zinc EDTA Chelate | 15% Zn 20 lb
    $172.00
    $0.00 $172.00
  • Ferti-Organic Soluble Humic Acid 0-0-7 - 1 lb Ferti-Organic Soluble Humic Acid 0-0-7 - 1 lb
    Ferti-Organic Soluble Humic Acid 0-0-7 - 1 lb
    Ferti-Organic Soluble Humic Acid 0-0-7 - 1 lb
    $12.00
    $0.00 $12.00
    $12.00 lb

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