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    Hydroponic Grow Media Rocks and Medium

    Hydroponic System DiagramIn a traditional garden, plant roots are in the soil. They support the plant and search for food and water. In hydroponics, we often use a growing medium in place of soil. The roots of a hydroponic plant do not work as hard as those of a plant grown in soil because their needs are readily met by the nutrient solution we feed them. Ideal mediums are chemically inert, porous, clean and able to drain freely.

    Many materials have been used as hydroponic growing mediums. These include: vermiculite, saw dust, sand, peat moss and, more recently, rockwool, perlite and expanded clay pebbles. Today's popular growing mediums, perlite, rockwool and expanded clay pebbles are described below

    Perlite
    Perlite is derived from volcanic rock which has been heated to extremely high temperatures. It then explodes like popcorn, resulting in the porous, white medium we use in hydroponics. Perlite can be used loose, in pots or bagged in thin plastics sleeves, referred to as "grow bags" because the plants are grown right in the bags. Plants in perlite grow bags are usually set up on a drip feed system. Perlite grow bags usually hold 3 or 4 long-term plants. Perlite is also used in many commercial potting soil mixes.

    Rockwool
    Rockwool is derived from basalt rock. It too is heated to high temperatures but then is spun into fibers resembling insulation. These fibers are spun into cubes and slabs for hydroponic production.The cubes are commonly used for plant propagation and the slabs are used similarly to the perlite grow bags. A plant is set onto the rockwool slab and grown there. The plant roots grow down into the slab. Rockwool slabs usually hold 3or 4 long term plants.

    Expanded Clay Pebbles
    Many hobby hydroponic gardeners use expanded clay pebbles for their growing medium. Expanded clay pebbles have a neutral pH and excellent capillary action. Often Ebb and Flow systems use expanded clay pebbles in the grow pots as the growing medium.

    (rockwool,media,rocks,clay,stonewool,medium)

    Mother Earth Hydroton Original Clay Pebbles - 10 Liter picture

    Mother Earth Hydroton Original Clay Pebbles - 10 Liter

    $18.26



     HYDROTON Clay Pebbles Grow Media Expanded Clay Rocks for Hydroponic Aquaponic  picture

    HYDROTON Clay Pebbles Grow Media Expanded Clay Rocks for Hydroponic Aquaponic

    $6.98



    Clay Pebbles HYDROTON Growing Media Expanded Clay Rocks for Hydroponic systems picture

    Clay Pebbles HYDROTON Growing Media Expanded Clay Rocks for Hydroponic systems

    $6.45



    Grodan 1

    Grodan 1" AO Rockwool Starter Plugs Cubes 200 count - hydroponic aquaponic media

    $19.75



    Hydroponic Grow Cubes - Rockwool medium, 1/3 Cubic Foot for Grow Box, System Kit picture

    Hydroponic Grow Cubes - Rockwool medium, 1/3 Cubic Foot for Grow Box, System Kit

    $14.99



    Grodan 1.5

    Grodan 1.5" AO Rockwool Starter Plugs, Sheet of 49 Cubes - Grow Media

    $12.99



    Grodan 1.5

    Grodan 1.5" x 1.5" x 1.5" Delta Mini Blocks Strip w/ Holes Rockwool Cube

    $7.25



    Canna Coco Coir Brick 40L Expanded - Soil Growing Medium Substra RHP 40 Liters picture

    Canna Coco Coir Brick 40L Expanded - Soil Growing Medium Substra RHP 40 Liters

    $32.99



    Grodan Round Rockwool 1.5

    Grodan Round Rockwool 1.5" Macro Plugs (5, 25, 50, 100) - Slit Included

    $9.80



    1 Inch Grodan Rockwool Cubes, Sheet of 100 picture

    1 Inch Grodan Rockwool Cubes, Sheet of 100

    $13.49



    HYDROTON - Original Hydroton® Expanded Clay Pebbles choose your Volume by Pound picture

    HYDROTON - Original Hydroton® Expanded Clay Pebbles choose your Volume by Pound

    $11.99



    QUALITY ORGANIC VERMICULITE MEDIUM / FINE ONE GAL SAME DAY SHIPPING USA picture

    QUALITY ORGANIC VERMICULITE MEDIUM / FINE ONE GAL SAME DAY SHIPPING USA

    $11.99



    CocoTek Bale Premium Coco Growing Media, OMRI Listed 5 kg Brown picture

    CocoTek Bale Premium Coco Growing Media, OMRI Listed 5 kg Brown

    $16.21



    4 LBS Clay Pebbles Grow Media Expanded Rocks , Hydroponic Aquaponic , Hydroton picture

    4 LBS Clay Pebbles Grow Media Expanded Rocks , Hydroponic Aquaponic , Hydroton

    $18.95



    Plantt Expanded Clay rocks Grow Media for Hydroponic and Aquaponic systems   picture

    Plantt Expanded Clay rocks Grow Media for Hydroponic and Aquaponic systems

    $6.79



    Grodan 1.5

    Grodan 1.5" AO Rockwool Starter Plug Cubes 98 count - hydroponic aquaponic media

    $19.75



    100% COCO COIR PEAT - ORGANIC HYDROPONIC GROWING MEDIA POTTING SOIL MICROGREENS picture

    100% COCO COIR PEAT - ORGANIC HYDROPONIC GROWING MEDIA POTTING SOIL MICROGREENS

    $11.99



    Grodan DELTA 10 BLOCK (6pcs) 4

    Grodan DELTA 10 BLOCK (6pcs) 4" x 4" x 4" With Hole Rockwool Cuttings Clones

    $16.50



    Turface- Professional Hydroponic Growth Medium/ Potting Soil -Screened- No Fines picture

    Turface- Professional Hydroponic Growth Medium/ Potting Soil -Screened- No Fines

    $36.95



    HYDROTON Leca Clay Pebbles 1/2 lb Grow Media for Hydroponic Aquaponic  picture

    HYDROTON Leca Clay Pebbles 1/2 lb Grow Media for Hydroponic Aquaponic

    $2.95