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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.

Twister T4 leaf trimming machine is the best for small to medium size gardens.  picture
Twister T4 leaf trimming machine is the best for small to medium size gardens.
$6799.95

Lite Line Gorilla Grow Tent - hydroponics garden supplies accessories grow media picture
Lite Line Gorilla Grow Tent - hydroponics garden supplies accessories grow media
$665.99

1.5
1.5"X1.5"X1.5" Case of 2940 Rockwool Cubes Grodan Delta Mini Block Cloning Seeds
$500.0

Lite Line Gorilla Grow Tent - hydroponics garden supplies accessories grow media picture
Lite Line Gorilla Grow Tent - hydroponics garden supplies accessories grow media
$431.99

Aquaponics Grow Medium Kit With Dual T5 Grow Light For Indoor Plants & Herbs picture
Aquaponics Grow Medium Kit With Dual T5 Grow Light For Indoor Plants & Herbs
$425.75

Canna Rhizotonic Nutrient Root System Development Rhizo Marine Algae All Media picture
Canna Rhizotonic Nutrient Root System Development Rhizo Marine Algae All Media
$409.8

(2000) Grodan Macro plugs- Starter plugs - Cloning plugs - Rockwool Round 1.5 picture
(2000) Grodan Macro plugs- Starter plugs - Cloning plugs - Rockwool Round 1.5
$389.95

Grow Light Systems 1000w - Adjust A Wing, Blackline, HPS & MH Lamp, Rope Ratchet picture
Grow Light Systems 1000w - Adjust A Wing, Blackline, HPS & MH Lamp, Rope Ratchet
$364.95

400w Electronic Digital Ballast HPS MH Grow Light System Hydroponics 120/240v picture
400w Electronic Digital Ballast HPS MH Grow Light System Hydroponics 120/240v
$340.05

Grodan A-Ok Starter Plugs™ 1.5
Grodan A-Ok Starter Plugs™ 1.5" 1 CASE (2940 CUBES) PROPAGATION CLONING ROCKWOOL
$329.99

Grow Light Systems 1000w - Adjust A Wing, Blackline, HPS & MH Lamp, Rope Ratchet picture
Grow Light Systems 1000w - Adjust A Wing, Blackline, HPS & MH Lamp, Rope Ratchet
$319.95

Complete Hydroponics Coco A & B 5 Gallon Base Nutrients Any System or Media picture
Complete Hydroponics Coco A & B 5 Gallon Base Nutrients Any System or Media
$319.95

Grodan A Ok Stonewool Cubes 1.5L x 1.5W x 1.5H Inches - 30 Sheets of 98 picture
Grodan A Ok Stonewool Cubes 1.5L x 1.5W x 1.5H Inches - 30 Sheets of 98
$309.99

15 X 5kg Bricks (165 LBS, 240 Gallons) Coco Coir Growing Media  *FREE SHIPPING* picture
15 X 5kg Bricks (165 LBS, 240 Gallons) Coco Coir Growing Media *FREE SHIPPING*
$275.0

Lite Line Gorilla Grow Tent - hydroponics garden supplies accessories grow media picture
Lite Line Gorilla Grow Tent - hydroponics garden supplies accessories grow media
$270.0

400w Electronic Digital Ballast HPS MH Grow Light System Hydroponics 120/240v picture
400w Electronic Digital Ballast HPS MH Grow Light System Hydroponics 120/240v
$260.39

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