Fertilizers
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Amendments
Soil Amendments & Growing MediaHealthy soil and growing media are the foundation...
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BioStimulants
Plant Biostimulants & Growth EnhancersBiostimulants are substances and microorganisms that improve plant...
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Specialty Crop Fertilizers
Professional-Grade Fertilizers Formulated for Specialty Crops Give your plants the precise nutrition...
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Foliar Fertilizers & Spray Supplies
Shop foliar fertilizers, soluble nutrients, biostimulants, and spray adjuvants for professional greenhouse,...
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Liquid Fertilizers
Blended Liquid Fertilizer ConcentratesLiquid fertilizer concentrates offer convenience and precision for hydroponic,...
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Organic Fertilizers
Dry Organic & Natural Mineral FertilizersCustom Hydro stocks a full range of...
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Schedule Consultation
Schedule a Fertilizer & Hydroponics ConsultationGet expert, one-on-one guidance from Custom Hydro...
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Stock Solution Preservatives
Preservatives for Fertilizer Solutions & Hydroponic ReservoirsMicrobial contamination in fertilizer stock solutions...
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Water Soluble Fertilizers
Shop water-soluble fertilizer ingredients and blended formulas for building a crop nutrition...
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.
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Ferti-Organic Soluble Fulvic Acid 69% - 4 lbRegular price $31.15Regular priceUnit price $7.79 per lb
$0.00Sale price $31.15 -
Calcium Carbonate 50 lb. | Pure Calcitic Limestone...Regular price $16.62Regular priceUnit price $0.33 per lb
$21.50Sale price $16.62Grower Price -
Copper EDTA Chelate | 15% Cu 1 lbRegular price $17.95Regular priceUnit price $17.95 per lb
$0.00Sale price $17.95 -
SOP 3IX 0-0-53 Crystalline Potassium Sulfate 20 lbRegular price $33.94Regular priceUnit price $1.70 per lb
$0.00Sale price $33.94 -
MasterBlend 0-20-42 Bloom Formula 4 lb.Regular price $20.98Regular priceUnit price $5.25 per lb$25.18Sale price $20.98Grower Price -
Copper EDTA Chelate | 15% Cu 4 lbRegular price $52.50Regular priceUnit price $13.13 per lb
$0.00Sale price $52.50 -
Potassium Nitrate Fertilizer 20 lb – Haifa Multi-K...Regular price $41.78Regular priceUnit price $2.09 per lb
$83.00Sale price $41.78Grower Price -
Ferti-Nitro Plus Organic Nitrogen 13.62-0-0 - 1 lbRegular price $16.22Regular priceUnit price $16.22 per lb
$0.00Sale price $16.22 -
Ferti-Organic Soluble Seaweed Extract 0-0-14 - 4 lbRegular price $37.80Regular priceUnit price $9.45 per lb
$0.00Sale price $37.80 -
Ferti-Organic Soluble Humic Acid 0-0-7 - 4 lbRegular price $27.50Regular priceUnit price $6.88 per lb
$0.00Sale price $27.50 -
DCAD Plus Potassium Carbonate 0-0-57 | 50 lbRegular price $96.43Regular priceUnit price $1.93 per lb$120.35Sale price $96.43Grower Price -
Haifa Cal Prime 17-0-0 Calcium Nitrate, 55 lb.Regular price $40.61Regular priceUnit price $0.74 per lb
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Kelpak Liquid Seaweed Concentrate | 0-0-1Regular price From $127.42Regular priceUnit price $50.97 per gal
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Manganese EDTA Chelate | 13% Mn 20 lbRegular price $152.80Regular priceUnit price $7.64 per lb
$0.00Sale price $152.80 -
Manganese Sulfate fertilizer 4 lb.Regular price $11.70Regular priceUnit price $2.93 per lb
$0.00Sale price $11.70 -
Calcium Nitrate 15.5-0-0 | 1 lbRegular price $2.26Regular priceUnit price $2.26 per lb
$0.00Sale price $2.26
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