Organic Silicon Fertilizers
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Wollastonite Calcium Silicate
Discover Better Yields with VANSIL Wollastonite Unique among soil amendments, VANSIL wollastonite...
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Diatomaceous Earth
Unleash Soluble Monosilicic Acid's Benefits Plants are capable of obtaining silicon in...
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Soft Rock Phosphate
Grow Smarter with Soft Rock Phosphate Unlock your plant's hidden potential with...
Unlock Plant Health Benefits with Organic Silicon
Custom Hydro carries a curated selection of naturally derived organic silicon fertilizers and minerals for farms, gardens, and hydroponic systems. Silicon is a plant-beneficial element known to strengthen cell walls, enhance root and shoot growth, and improve resistance to pests, disease, and environmental stress.
Organic Silicon Sources
- Soluble Silica — fast-acting, ideal for fertigation & foliar application
- Calcium Silicate (Wollastonite) — slow-release soil amendment
- Diatomaceous Earth — natural pest suppression & soil conditioning
All products are naturally derived and suitable for organic production systems. Fast nationwide shipping available.
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CalPhos POWDER 50 lb.Regular price $17.99Regular priceUnit price $0.36 per lb$27.00Sale price $17.99Grower Price -
CalPhos soft rock phosphate GRANULAR 50 lb.Regular price $17.50Regular priceUnit price per
$26.50Sale price $17.50Sold out -
Wollastonite Calcium Silicate Fertilizer 4 lbRegular price $7.45Regular priceUnit price $1.86 per lb
$0.00Sale price $7.45 -
VanSil CS-1 Wollastonite Calcium Silicate 50 lbRegular price $27.38Regular priceUnit price $0.55 per lb$41.07Sale price $27.38Grower Price -
Super Triple Phosphate 0-46-0 fertilizer 50 lb.Regular price $41.63Regular priceUnit price per$62.60Sale price $41.63Grower Price -
CalPhos soft rock phosphate 20 lb.Regular price $10.50Regular priceUnit price per$0.00Sale price $10.50Sold out -
Wollastonite Calcium Silicate Fertilizer 20 lbRegular price $18.70Regular priceUnit price $0.94 per lb
$0.00Sale price $18.70 -
Wollastonite Calcium Silicate Fertilizer 1 lbRegular price $5.20Regular priceUnit price $5.20 per lb
$0.00Sale price $5.20 -
Sil-MATRIX LC Potassium Silicate 2.5 GallonRegular price $93.85Regular priceUnit price per$130.36Sale price $93.85Grower Price -
CalPhos soft rock phosphate 4 lb.Regular price $5.00Regular priceUnit price per$0.00Sale price $5.00Sold out -
CalPhos soft rock phosphate 4 lb. STANDARD POWDERRegular price $5.00Regular priceUnit price per
$0.00Sale price $5.00 -
Fertoz Organic POWDERED Rock Phosphate FertilizerRegular price $32.04Regular priceUnit price per$44.50Sale price $32.04Grower Price -
CalPhos soft rock phosphate 1 lb.Regular price $2.75Regular priceUnit price per$0.00Sale price $2.75Sold out -
DIATOMACEOUS EARTH 50 lb.Regular price $45.00Regular priceUnit price per$47.00Sale price $45.00Grower Price -
Diatomaceous Earth Food Grade with Free Duster -...Regular price $15.42Regular priceUnit price per$20.66Sale price $15.42Grower Price -
Sigma SI With Value-Added Biologicals 50lb. BAGRegular price $41.73Regular priceUnit price per$62.76Sale price $41.73Grower Price
Serving Arkansas, Kansas, Missouri and Oklahoma. Shipping Nationwide! Wholesale to the public!