Additives

Additives

  • GH Armor Si, 1 qt

    $15.80
    Armor Si™ is suitable for all types of plants during all stages of growth. It can be used for plants growing in hydroponics, coco coir and all types of media. Use as a growth enhancer with irrigation water or in addition to your regular fertilizers...
    $15.80
  • GH Floralicious Plus, 1 oz POP

    $3.99
    NEW from General Hydroponics, convenient and attractive countertop displays. These 1 oz bottles all have flip-top drip-tops for easy application. With a usage rate of 1 ml per gallon, this 1 oz bottle of Floralicious Plus dilutes into 30 gallons! Plenty...
    $3.99
  • GH KoolBloom, 2.2 lbs

    $29.40
    KoolBloom •     Encourages abundant flowering • Facilitates ripening in annuals • Boosts production of essential oils and fragrances • Increases size and weight of fruits and flowers • Precisely formulated to...
    $29.40
  • GH Liquid KoolBloom, 1 qt

    $21.76
    Liquid KoolBloom  • Forces abundant flowering   • Boosts production of essential oils and fragrances • Increases size and weight of fruits and flowers • Precisely formulated to  enhance the performance of all...
    $21.76
  • *Comes without testing bottle

    GH pH Test Indicator Fluid

    GH

    $7.99
    General Hydroponics® pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator and observe the coloration of the liquid in the test vial. Many experienced growers prefer our pH Test Kit to...
    $7.99
  • GH RapidStart, 1 oz POP

    $6.49
    NEW from General Hydroponics, convenient and attractive countertop displays. These 1 oz bottles all have flip-top drip-tops for easy application. RapidStart provides accelerated root growth and is an excellent tool to have on hand during cloning,...
    $6.49
  • RapidStart Root Enhancer, 125 ml

    $26.49
    RapidStart enhances your growing experience by delivering a powerful blend of premium plant extracts, amino acids, and nutrients generating explosive root growth. Using RapidStart stimulates prolific root branching and development of fine root hairs that...
    $26.49
  • RapidStart Root Enhancer, 275 ml

    $39.99
    RapidStart enhances your growing experience by delivering a powerful blend of premium plant extracts, amino acids, and nutrients generating explosive root growth. Using RapidStart stimulates prolific root branching and development of fine root hairs that...
    $39.99