Organic Cannabis Fertilizers
Unlock Your Cannabis Crop's Full Potential — Organically
Custom Hydro carries a premium selection of OMRI-listed and naturally derived organic fertilizers specifically suited for cannabis cultivation. Whether you're growing in soil or coco coir, our organic nutrient sources support vigorous growth, dense flowering, and superior end-product quality — without synthetic inputs.
Fast-Release Organic Options
- Soybean Protein Hydrolysate — high-nitrogen, fast-acting
- Fish Bone Meal — phosphorus-rich for flowering
- Soluble Kelp & Seaweed Extracts — potassium & micronutrients
Slow-Release & Soil-Building Options
- Bat Guano (high-N & high-P varieties)
- Blood Meal & Feather Meal
- Alfalfa Meal — natural growth stimulant (triacontanol)
- Worm Castings — broad-spectrum soil biology support
All products are suitable for certified organic production. Fast nationwide shipping available.
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Magriculture Magnesium Sulfate Heptahydrate 50 lbRegular price $26.30Regular priceUnit price $0.53 per lb$41.64Sale price $26.30Grower Price -
Ferti-Fulvic Plus 90% Fulvic Acid - 4 lbRegular price $32.10Regular priceUnit price $8.03 per lb
$0.00Sale price $32.10 -
Ferti-Organic Soluble Seaweed Extract 0-0-14 - 50 lbRegular price $370.90Regular priceUnit price $7.42 per lb$568.40Sale price $370.90Grower Price -
Ferti-Corn Steep Powder 6-7-7 Organic NPK - 4...Regular price $19.68Regular priceUnit price $4.92 per lb
$0.00Sale price $19.68 -
Ferti-Fulvic Plus 90% Fulvic Acid - 1 lbRegular price $13.81Regular priceUnit price $13.81 per lb
$0.00Sale price $13.81 -
Ferti-Organic Soluble Fulvic Acid 69% - 1 lbRegular price $13.40Regular priceUnit price $13.40 per lb
$0.00Sale price $13.40 -
Ferti-Nitro Plus Organic Nitrogen 13.62-0-0 - 50 lbRegular price $322.62Regular priceUnit price $6.45 per lb$401.80Sale price $322.62Grower Price -
Ferti-Fulvic Plus 90% Fulvic Acid - 50 lbRegular price $226.90Regular priceUnit price $4.54 per lb$383.40Sale price $226.90Grower Price -
Ferti-Nitro Plus Organic Nitrogen 13.62-0-0 - 4 lbRegular price $41.02Regular priceUnit price $10.26 per lb
$0.00Sale price $41.02 -
Ferti-Organic Soluble Fulvic Acid 69% - 4 lbRegular price $31.15Regular priceUnit price $7.79 per lb
$0.00Sale price $31.15 -
Ferti-Organic Soluble Fulvic Acid 69% - 50 lbRegular price $218.95Regular priceUnit price $4.38 per lb$304.10Sale price $218.95Grower 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 -
Calcium Carbonate 50 lb.Regular price $16.62Regular priceUnit price $0.33 per lb$21.50Sale price $16.62Grower Price -
Ferti-Organic Soluble Humic Acid 0-0-7 - 50 lbRegular price $196.27Regular priceUnit price $3.93 per lb$290.00Sale price $196.27Grower Price -
Ferti-Organic Soluble Humic Acid 0-0-7 - 4 lbRegular price $27.50Regular priceUnit price $6.88 per lb
$0.00Sale price $27.50 -
Ferti-Organic Soluble Seaweed Extract 0-0-14 - 4 lbRegular price $37.80Regular priceUnit price $9.45 per lb
$0.00Sale price $37.80
Serving Arkansas, Kansas, Missouri and Oklahoma. Shipping Nationwide! Wholesale to the public!