• Kelpak liquid seaweed concentrate - 2.5 gal
  • Kelpak cold cellburst process kelp extract.
  • Kelpak cold processed liquid seaweed fertilizer
  • Large white IBC container of Kelpak liquid seaweed fertilizer with a green label on a white background
  • Description
  • Product Features
  • Specifications
  • Application Rates

Kelpak Liquid Seaweed Concentrate — Cold-Burst Kelp Extract for Stronger Crops

Kelpak is a scientifically validated liquid seaweed biostimulant derived from fresh Ecklonia maxima kelp, sustainably harvested by divers off the South African coast. Its proprietary Cold Cellular-Burst extraction process preserves the full spectrum of natural auxins and cytokinins — the plant hormones that drive root development, stress tolerance, and yield.

Key Benefits

  • Stronger root development — natural auxins stimulate root initiation and elongation
  • Higher yields & fruit set — cytokinins improve cell division, pollen germination, and fruit uniformity
  • Abiotic stress reduction — buffers plants against heat, drought, and transplant shock
  • Certified for organic production — clean, sustainable, no synthetic chemicals
  • 45+ years of field trial data — one of the most researched seaweed extracts globally

Guaranteed Analysis

  • Soluble Potash (K₂O): 1%
  • Derived from: Ecklonia maxima seaweed

Application

Apply via fertigation, drip irrigation, or foliar spray. Compatible with most nutrient programs. Conduct a jar test before tank mixing. Refer to label for crop-specific rates.

Resources

  • Easy to use: Kelpak® can be applied as a soil drench, through fertigation and via foliar spray with nutrients.
  • Organic input: CDFA and WSDA organic registrations.
  • Pure: Kelpak is a pure seaweed extract, meaning it's primarily composed of the natural compounds extracted from Ecklonia maxima kelp, a type of brown seaweed.
  • Water Soluble: Kelpak is formulated to dissolve readily in water, making it easy to mix with irrigation systems or spray solutions.
GUARANTEED ANALYSIS
0-0-1

Soluble Potash (K20) 1.0%

DERIVED FROM FRESH ECKLONIA MAXIMA KELP

pH of Kelpak® ……………4.6

ALWAYS MAINTAIN A pH of 7.0 OR LESS
Kelpak application 
  • Seed coating 
  • In-furrow application 
  • Root dip 
  • Soil drench 
  • Drip irrigation 
  • Foliar spray conventional, electrostatic or aerial 
  1. Do not dilute more than 0.2% with foliar application.
  2. Do not dilute more than 0.1% with application through drip irrigation, apply as a pulse during last 10 minutes of irrigation cycle.
  3. Maintain pH below 7 
  4. Compatible with most agrochemicals.

Kelpak Liquid Seaweed Concentrate | 0-0-1

Kelpak Liquid Seaweed Concentrate | 0-0-1

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$127.42
$127.42
$50.97 gal
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What Makes Us Different

At the leading edge of the market, Custom Hydro stands out by providing the growing industry with fertilizers that are not only of premium quality but also feature innovative
solutions tailored for the unique needs of hydroponic and organic farming practices.

  • Premium Quality

    The Mark of Trusted Quality.

  • Highest Purity

    Never Compromise on the Quality of Inputs.

  • Crop Specific

    Customized Fertilizer for your Favorite Crops.

Size and shipping comparison

SizePriceShipping weightAvailable
each (2.5 gallon jug) $127.42 24.0 lb 51
case (2x 2.5 gallon jugs) $249.75 48.0 lb 2
250 gallon tote $11,220.00 2505.0 lb 20