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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.

Grodan AOK Rockwool Starter Plugs 1
Grodan AOK Rockwool Starter Plugs 1" / 1.5" / 2" for Seedlings and Cuttings + TC
$259.99

Grodan AOK Rockwool Starter Plugs 1
Grodan AOK Rockwool Starter Plugs 1" / 1.5" / 2" for Seedlings and Cuttings + TC
$259.99

Floraflex Floracap 8
Floraflex Floracap 8" Inch Plastic Irrigation Cover Rockwool Cube 3pk 12pk OR 50
$258.95

Grodan AOK Rockwool Starter Plugs 1
Grodan AOK Rockwool Starter Plugs 1" / 1.5" / 2" for Seedlings and Cuttings + TC
$249.99

100 Pack 6
100 Pack 6" Plastic Drip Tray Cover Irrigation Smartpot Hugo Rockwool Cube Block
$249.99

Root Farm Felt Medium Garden Pot 24 pk picture
Root Farm Felt Medium Garden Pot 24 pk
$242.99

Bluelab Multi-Media PH Meter - Works In Coco, Soil, Water & Rockwool picture
Bluelab Multi-Media PH Meter - Works In Coco, Soil, Water & Rockwool
$240.2

Grodan Delta 10 Large Rockwool Gro Blocks 4
Grodan Delta 10 Large Rockwool Gro Blocks 4" X 4 " X 4 Inch / 1 Case = 24 Strips
$240.99

Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE picture
Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE
$239.9

Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE picture
Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE
$239.9

Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE picture
Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE
$239.9

Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE picture
Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE
$239.9

Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE picture
Prime Grower Disposable Nitrile Gloves ( Small / Medium / Large / XL) FULL CASE
$239.9

(12) Grodan 1
(12) Grodan 1" AO Rockwool Starter Plugs 200 Cube Slabs hydroponic aquaponic
$237.34

Grodan Rock Wool Cube - 15 X 15 X 14cm - Pack Of 36 - Hydroponic Rockwool picture
Grodan Rock Wool Cube - 15 X 15 X 14cm - Pack Of 36 - Hydroponic Rockwool
$232.45

Grodan Rock Wool Cube - 15 X 15 X 14cm - Pack Of 36 - Hydroponic Growing Medium picture
Grodan Rock Wool Cube - 15 X 15 X 14cm - Pack Of 36 - Hydroponic Growing Medium
$232.45

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