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General Hydroponics

Helping the world grow! Located in Sebastopol, California General Hydroponics nutrients, systems and gardening products lead the industry in innovation and superior results. Achieve your own outstanding success with GH premium plant foods, media and equipment. There’s nothing better anywhere!

Visit the company’s Feeding Schedule (PDF) here.

  • CALiMAGic


    A concentrated blend of readily available calcium (Ca) and magnesium (Mg).

    $16.50 $13.50
  • RapidStart Rooting Enhancer

    RapidStart (1-0.5-1)

    Concentrated plant extracts stimulate explosive root development and branching.

    $26.50 $21.95
  • AeroFlo Aeroponic System

    AeroFlo 60

    Available with a 40-gallon reservoir and SIX 6 ft. growing chambers – 10 sites each.

    $1,173.50 $949.95
  • AeroFlo Aeroponic System

    AeroFlo 36

    Available with a 40-gallon reservoir and SIX 4 ft. growing chambers – 6 sites each.

    $937.95 $759.95
  • AeroFlo Aeroponic System

    AeroFlo 30

    A compact setup that’s perfect for growing greens, vegetables, berries and flowers.

    $559.95 $514.95
  • AeroFlo Aeroponic System

    AeroFlo 20

    Delivers a super-oxygenated, nutrient-rich mist to your plant’s roots.

    $421.95 $344.95
  • AeroFlo Aeroponic System

    AeroFlo 18

    Looking for an aeroponic garden with a proven track record? Well, here it is!

    $429.00 $389.95
  • Rubber Grommets

    Grommets (10pk)

    Rubber grommets snap into place and form a water-tight seal in pre-drilled holes.

    $6.95 $5.95
  • Rapid Rooter Plugs

    Rapid Rooter Plugs

    Enriched with micronutrients and beneficial bacteria for superior results.

    $16.95 $13.50
  • FloraBlend Vegan Compost Tea


    Made from a select blend of plant materials plus seaweed and rock powders.

    $12.00 $10.95
  • Rapid Rooter Mat

    Rapid Rooter Mat

    Each pack contains 98 cross-cut planting sites derived from composted tree bark.

    $23.95 $18.95
  • AzaMax (Azadirachtin)

    AzaMax (Azadirachtin)

    Works as well as synthetic formulas, but without the environmental impact.

    $28.95 $21.95
  • Azamax Ready To Spray

    Azamax Spray

    Easy to use, just drop one pre-dosed vial into the bottle, add water, shake and apply.

    $13.50 $14.95
  • General Hydroponics pH-Down

    pH Down (Acid)

    Use sparingly — just a little at a time is all you need to achieve proper levels.

  • General Hydroponics pH-Up

    pH Up (Base)

    Add a little at a time to raise the pH of your nutrient solution to the proper level.

  • pH 4.01 Calibration Solution

    pH 4.01

    Easy to use, just dip your meter electrode into a small amount of the buffer and …

  • pH 7.0 Calibration Solution

    pH 7.0

    Allows growers to calibrate many popular meter brands with confidence.

  • pH Test Indicator

    pH Test Indicator

    Easy to use, accurate and inexpensive! Just a few drops is all it takes for fast results.

    $7.95 $6.95
  • TDS Calibration Solution

    Standard Reference

    Easy to use, just dip your electrode into a small amount of the buffer and adjust.

    $21.50 $19.95
  • Diamond Nectar

    Diamond Nectar

    Premium grade humic acids improve the uptake and utilization of trace minerals…

    $17.50 $14.50
  • Flora Bloom Hydroponic Nutrient

    Flora Bloom

    Provides nutrients that are essential for a complete hydroponic plant diet.

  • FloraDuo (Part A & B)

    FloraDuo (A & B)

    Use to meet the demands of all plants through every phase — seedling to harvest!

  • Flora Grow Hydroponic Nutrient

    Flora Grow

    The most widely used hydroponic nutrient in the world because it is the best!

  • Floralicious Bloom

    Floralicious Bloom

    Use to promote maximum flower size and fruit swelling for heavy yields.

    $26.95 $22.50
  • Floralicious Grow

    Floralicious Grow

    Builds the leaf and root masses needed for healthy growth and superior harvests.

    $26.95 $22.50
  • Floralicious Plus 1

    Floralicious Plus

    Combines plant, marine, and mineral extracts to create a one part nutrient …

  • Flora Micro Hardwater

    Flora Micro Hardwater

    Required if your tap water is over 200 ppm, or contains calcium above 70 ppm.

  • Flora Micro Hydroponic Nutrient

    Flora Micro

    This formula is known throughout the world as the industry standard.

  • FloraNectar Sweetener

    Flora Nectar Sweetener

    Simply sweeter! Flora Nectar encourages sweetness and aroma into your fruits …

    $21.00 $17.50
  • FloraNova Bloom

    FloraNova Bloom

    Use to stimulate exceptional budding and blooming in flowering plants.

    $27.50 $23.95
  • FloraNova Grow

    FloraNova Grow

    Gives indoor gardeners the strength of a dry concentrate and the ease of a liquid.

    $27.50 $23.95
  • FloraShield

    Flora Shield

    Use to rinse systems and plants during all phases of the life cycle.

    $28.95 $24.95
  • Kool Bloom


    This powerful nutrient additive enhances production of essential oils and …

    $15.50 $12.95
  • Liquid Kool Bloom

    Liquid KoolBloom

    Promotes abundant flowering and helps facilitate ripening in flowers …

    $21.95 $17.95
  • Pineapple Rush

    Pineapple Rush

    Made with quality organic sugars, including molasses and raw cane sugar.

  • Dual Diaphragm Air Pump

    Dual Diaphragm

    Includes four fully adjustable output valves, allowing the perfect volume of airflow.

    $101.00 $79.95
  • EcoGrower Hydroponic System 1

    EcoGrower Max

    The EcoGrower Max uses an air driven “spider” drip design with 6-inch net pots.

    $233.95 $189.95
  • EuroGrower Drip System


    A simple and compact setup that’s the perfect garden for a one light operation.

    $616.50 $499.95
  • FloraKleen Clearing Solution


    Removes fertilizer residues that can accumulate over time in systems and media.

    $9.95 $8.95
  • MegaFarm Drip System


    Includes a heavy-duty 20-gallon grow chamber that sits on top of a large reservoir.

    $386.95 $314.95
  • TNC Water Pump

    TNC (1/4 HP)

    Reliably moves 1268 gallons per hour through 1-inch pipe thread fittings.

    $231.95 $179.95
  • WaterFarm 8-Pack Hydroponic System

    WaterFarm, 8-Pack

    Includes EIGHT WaterFarm modules all connected together to one controller.

    $514.95 $449.95
  • WaterFarm Complete


    One of our best hydroponic systems for growing large plants in a small space.

    $65.95 $59.95
  • Waterpower Submersible Pump


    Fully submersible, magnetic drive and NO replacement seals — it’s one of the best!

    $131.95 $99.95
  • Rapid Rooter Tray

    Rapid Rooter

    The optimal air-to-water ratio within the plug matrix causes explosive root growth.

    $23.95 $18.95
  • SubCulture-B Bacterial Root Inoculant


    This blend of beneficial microbes will improve the vitality and yield in all plants.

    $36.95 $33.50
  • SubCulture-M Mycorrhizal Root Inoculant


    Use from germination or propagation all the way through harvest.

    $21.00 $17.95
  • CocoTek Mats (10-Pack)

    CocoTek Mats

    Provides support for plant roots that grow through and under the media.