Organic Fertilizers

  • Organic N-P-K fertilizer mixes collection — natural nitrogen phosphorus potassium blends for professional growers

    Organic N-P-K Fertilizer Mixes

    Organic N-P-K Fertilizer Mixes — Complete Nutrition from Natural SourcesShop our full...

    Organic N-P-K Fertilizer Mixes

  • Organic Micro Nutrients

    Organic Micro Nutrients

    Custom Hydro is your go-to source for all organic trace element fertilizers...

    Organic Micro Nutrients

  • Organic nitrogen fertilizers collection — natural and OMRI listed nitrogen sources for professional growers

    Organic Nitrogen Fertilizers

    Boost Your Crops with Organic Nitrogen FertilizersCustom Hydro carries a full selection...

    Organic Nitrogen Fertilizers

  • Organic phosphorus fertilizers collection — natural phosphorus sources for root development and professional growers

    Organic Phosphorus Fertilizers

    Give Your Soil the Phosphorus Boost It NeedsCustom Hydro stocks a comprehensive...

    Organic Phosphorus Fertilizers

  • Organic potassium fertilizers collection — natural potassium sources for fruit quality and professional crop production

    Organic Potassium Fertilizers

    Supercharge Your Crops with Organic PotassiumCustom Hydro carries a premium selection of...

    Organic Potassium Fertilizers

  • Organic calcium fertilizers collection — natural calcium sources for cell wall strength and professional horticulture

    Organic Calcium Fertilizers

    Build Stronger Plants with Organic CalciumCustom Hydro stocks a large selection of...

    Organic Calcium Fertilizers

  • Organic magnesium fertilizers collection — natural magnesium sources for chlorophyll production and professional growers

    Organic Magnesium Fertilizers

    Replenish Magnesium Naturally for Healthier PlantsCustom Hydro stocks a curated selection of...

    Organic Magnesium Fertilizers

  • Organic sulfur fertilizers collection — natural sulfur sources for protein synthesis and professional crop nutrition

    Organic Sulfur Fertilizers

    Give Your Farm the Sulfur It Needs — OrganicallyCustom Hydro carries a...

    Organic Sulfur Fertilizers

  • Organic silicon fertilizers collection — natural silicon sources for plant strength and stress resistance

    Organic Silicon Fertilizers

    Unlock Plant Health Benefits with Organic SiliconCustom Hydro carries a curated selection...

    Organic Silicon Fertilizers

  • Kelpak liquid seaweed concentrate - 2.5 gal

    Organic Specialty Crop Fertilizers

    Unlock Your Crop's Full Potential — OrganicallyCustom Hydro carries a premium selection...

    Organic Specialty Crop Fertilizers

Dry Organic & Natural Mineral Fertilizers

Custom Hydro stocks a full range of dry organic and natural mineral fertilizers for commercial specialty crop, vegetable, and greenhouse production. From OMRI-listed organic inputs to natural mineral sources, our selection supports both certified organic and conventional programs.

Product Categories

  • Organic nitrogen sources — feather meal, blood meal, soybean meal
  • Organic phosphorus sources — bone meal, rock phosphate
  • Organic potassium sources — kelp meal, greensand, sulfate of potash
  • Natural mineral fertilizers — gypsum, lime, dolomite
  • Slow-release fertilizers for custom media blends
  • OMRI-listed inputs for certified organic production

Key Features

  • OMRI-listed options for certified organic production
  • Slow-release and fast-release options available
  • Suitable for soil, raised bed, and container production
  • Bulk pricing available — contact us for wholesale quotes

Ideal Applications

  • Commercial specialty crop and hemp production
  • Vegetable and greenhouse crop production
  • Greenhouse and container growing
  • Custom soil and media blending
  • Phos Sea Bird 9lb Guano Powder 0-12-0
    Roots Oganics Seabird Guano, 9 lbs
    Grower Price
    Roots Oganics Seabird Guano, 9 lbs
    $24.49
    $33.47 $24.49
    Grower Price
  • Tomato-tone 3-4-6 18 lb.
    Tomato-tone 3-4-6 18 lb.
    Grower Price
    Tomato-tone 3-4-6 18 lb.
    $21.10
    $31.74 $21.10
    Grower Price
  • Azomite 20 lb.
    Azomite 20 lb.
    Azomite 20 lb.
    $26.40
    $0.00 $26.40
  • Sigma 4-4-4 Bio Fine Grade With Value-Added Biologicals | 50 lb. Sigma 4-4-4 Bio Fine Grade With Value-Added Biologicals | 50 lb.
    Sigma 4-4-4 Bio Fine Grade With Value-Added Biologicals...
    Sigma 4-4-4 Bio Fine Grade With Value-Added Biologicals...
    $30.06
    $30.06
    $0.60 lb
  • Old Bridge Zinc Sulfate Monohydrate | OMRI 55 lb Old Bridge Zinc Sulfate Monohydrate | OMRI 55 lb
    Old Bridge Zinc Sulfate Monohydrate | OMRI 55...
    Old Bridge Zinc Sulfate Monohydrate | OMRI 55...
    $85.68
    $0.00 $85.68
  • White 2.5 gallon container of Ferti-Organic's Ferti-Soil label on a white background A short vide introduction to Ferti-Soil bio stimulant
    Ferti-Soil Microbial Soil Activator - 2.5 Gallon
    Grower Price
    Ferti-Soil Microbial Soil Activator - 2.5 Gallon
    $305.90
    $460.00 $305.90
    $122.36 gal
    Grower Price
  • Roots Organics Terp Tea Bloom Booster 40lb
    Roots Organics Terp Tea Bloom Booster 40 lb
    Grower Price
    Roots Organics Terp Tea Bloom Booster 40 lb
    $281.46
    $383.39 $281.46
    Grower Price
  • FISH SEAWEED BLEND GALLON 2-3-1
    FISH SEAWEED BLEND GALLON 2-3-1
    Grower Price
    FISH SEAWEED BLEND GALLON 2-3-1
    $48.62
    $73.10 $48.62
    Grower Price
  • Nitrogen Bat Guano 9 Lb 9-3-1
    Nitrogen Bat Guano 9 Lb 9-3-1
    Grower Price
    Nitrogen Bat Guano 9 Lb 9-3-1
    $31.60
    $43.19 $31.60
    Grower Price
  • Garden-tone 3-4-4 4 lb.
    Garden-tone 3-4-4 4 lb.
    Garden-tone 3-4-4 4 lb.
    $7.58
    $0.00 $7.58
  • Organic Bone Meal Organic Bone Meal
    Organic Bone Meal
    Organic Bone Meal
    From $7.75
    $0.00 From $7.75
    $1.94 lb
  • Sigma Biochar 5 micron Activated Biochar | 2.5 gallons Sigma Biochar 5 Micron activated liquid biochar infographic — 65% organic carbon, improves CEC and water retention, promotes soil biology, for turf, trees, and fertigation
    Sigma Biochar 5 micron Activated Biochar | 2.5...
    Sigma Biochar 5 micron Activated Biochar | 2.5...
    $149.63
    $149.63
    $59.85 gal
  • Sigma K-Ferm liquid potassium fertilizer 2.5 gallon jug — 12% K₂O fermentation-derived, for organic production Sigma K-Ferm organic liquid potassium fertilizer infographic — 12% K₂O, fermentation-derived organic acids, rapid potassium uptake, for foliar, fertigation, and turfgrass applications
    Sigma K-Ferm Performance Fertilizer for Organic Production |...
    Sigma K-Ferm Performance Fertilizer for Organic Production |...
    $253.05
    $253.05
    $101.22 gal
  • Sigma 6-2-6 Bio Fine With Value-Added Biologicals | 50 lb. Sigma 6-2-6 Bio Fine With Value-Added Biologicals | 50 lb.
    Sigma 6-2-6 Bio Fine With Value-Added Biologicals |...
    Sigma 6-2-6 Bio Fine With Value-Added Biologicals |...
    $38.68
    $38.68
    $0.77 lb
  • Sigma 2-4-2 Bio With Value-Added Biologicals | 50 lb. Sigma 2-4-2 Bio With Value-Added Biologicals | 50 lb.
    Sigma 2-4-2 Bio With Value-Added Biologicals | 50...
    Sigma 2-4-2 Bio With Value-Added Biologicals | 50...
    $26.20
    $26.20
    $0.52 lb
  • Roots Organics Terp Tea Microbe Charge 9lb
    Roots Organics Terp Tea Microbe Charge 9 lb
    Grower Price
    Roots Organics Terp Tea Microbe Charge 9 lb
    $89.10
    $101.51 $89.10
    Grower Price

Serving Arkansas, Kansas, Missouri and Oklahoma. Shipping Nationwide! Wholesale to the public!