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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.

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

Clay Pebbles HYDROTON Growing Media Expanded Clay Rocks for Hydroponic systems

$22.95



2pc 650G Coco Coir Bricks Coconut Fiber Organic Potting Soil Plant Growing Media picture

2pc 650G Coco Coir Bricks Coconut Fiber Organic Potting Soil Plant Growing Media

$11.99



Coconut Husk Chips Husk fiber Orchids Anthodium Growing Medium  1Kg picture

Coconut Husk Chips Husk fiber Orchids Anthodium Growing Medium 1Kg

$28.00



SALE 5000G Coco Coir Brick Coconut Fiber Potting Soil Garden Plant Growing Media picture

SALE 5000G Coco Coir Brick Coconut Fiber Potting Soil Garden Plant Growing Media

$22.99



Grodan Rockwool Cubes (1. 5 Inches) 49 Cubes picture

Grodan Rockwool Cubes (1. 5 Inches) 49 Cubes

$11.41



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

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

$21.95



FREE GIFT Prostar Gro Rockwool Cubes 1.5'' Growing Medium (40 PCs) FREE Scissor* picture

FREE GIFT Prostar Gro Rockwool Cubes 1.5'' Growing Medium (40 PCs) FREE Scissor*

$9.20



QUALITY MEDIUM COARSE GRADE VERMICULITE FOR SEED STARTING MEDIUM GARDEN BEDDING picture

QUALITY MEDIUM COARSE GRADE VERMICULITE FOR SEED STARTING MEDIUM GARDEN BEDDING

$14.95



Grodan Improved 10  Rockwool Wrapped  4x4x4. 6 ea picture

Grodan Improved 10 Rockwool Wrapped 4x4x4. 6 ea

$16.89



HOT SALE Prostar Gro Rockwool Cubes 1.5'' Growing Medium (60 PCs) FREE Scissor* picture

HOT SALE Prostar Gro Rockwool Cubes 1.5'' Growing Medium (60 PCs) FREE Scissor*

$11.45



QUALITY MEDIUM COARSE PERLITE FOR SEED STARTING NURSERY POTTING GARDEN PLANTS picture

QUALITY MEDIUM COARSE PERLITE FOR SEED STARTING NURSERY POTTING GARDEN PLANTS

$14.95



Grodan Round Rockwool Macro Plugs 1.5

Grodan Round Rockwool Macro Plugs 1.5" Starter Cloning Plug w/ Slit Macroplugs

$7.28



PERLITE 1 gallon MEDIUM-FINE GRADE NURSERY GARDEN PLANTS SEED STARTING FASTSHIP picture

PERLITE 1 gallon MEDIUM-FINE GRADE NURSERY GARDEN PLANTS SEED STARTING FASTSHIP

$10.97



Coco Peat Block Coconut Husk Chips Coco Coir Organic Natural Growing Medium  picture

Coco Peat Block Coconut Husk Chips Coco Coir Organic Natural Growing Medium

$18.90



100% pure Coconut Husk Chip 10mm Organic Growing Media Orchids Anthurim 250g bag picture

100% pure Coconut Husk Chip 10mm Organic Growing Media Orchids Anthurim 250g bag

$25.36



Coconut Husk Chips Orchids Anthurim Growing Media Dry Natural 10mm Organic Coco  picture

Coconut Husk Chips Orchids Anthurim Growing Media Dry Natural 10mm Organic Coco

$5.74



Grodan 1

Grodan 1" A OK Starter Plugs Cubes Bulk Qty - rockwool hydroponic growing media

$12.99



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



5kg Potting Soil Brick Cultivation Coconut Fibers  Coir Fibers Growing Media USA picture

5kg Potting Soil Brick Cultivation Coconut Fibers Coir Fibers Growing Media USA

$21.88



Coconut husk chips dry fiber orchids anthodium growing medium  picture

Coconut husk chips dry fiber orchids anthodium growing medium

$45.99