Hydroponics Online Store



Hydroponic Systems

Hydroponic Grow Lights & Bulbs

Hydroponic Tents & Grow Boxes

Hydroponic Ballasts

Grow Light Reflectors

Hydroponic Nutrients

Grow Media Rocks

Hydroponic Pumps

Hydroponic Pots

Hydroponic Books

Meters

Hydroponic Exhaust Fans

Hydroponic Seeds

Hydroponic Foggers

Home Store Blog Forums FAQs Lesson Plans Pictures


Search:

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)

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

Clay Pebbles HYDROTON Growing Media Expanded Clay Rocks for Hydroponic systems

$25.98



Mother Earth Hydroton Original Clay Pebbles - 25 Liter picture

Mother Earth Hydroton Original Clay Pebbles - 25 Liter

$27.09



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

HYDROTON Clay Pebbles Grow Medium Expanded Clay Rocks for Hydroponic Aquaponic

$6.43



Mother Earth Hydroton Original Clay Pebbles - 10 Liter picture

Mother Earth Hydroton Original Clay Pebbles - 10 Liter

$18.26



GRODAN MACRO PLUG ROCKWOOL STONEWOOL STARTER CLONING MEDIA ROUND 1.5

GRODAN MACRO PLUG ROCKWOOL STONEWOOL STARTER CLONING MEDIA ROUND 1.5"

$11.25



6.5 lb Clay Pebbles Growing Media Expanded Clay Hydroponic Horticultural Rocks picture

6.5 lb Clay Pebbles Growing Media Expanded Clay Hydroponic Horticultural Rocks

$16.79



Grodan 1.5

Grodan 1.5" x 1.5" x 1.5" BULK QTY Delta Mini Blocks INDIVIDUAL Rockwool Cubes

$9.99



Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (30 Per Pack) picture

Rockwool Grow Cubes (1.5 Inches) - Growing Medium Starter Sheets (30 Per Pack)

$9.83



4 Sheets Rockwool Grow Cubes for Rooting, Cuttings, Clone Plants, 200 Plugs picture

4 Sheets Rockwool Grow Cubes for Rooting, Cuttings, Clone Plants, 200 Plugs

$20.99



1.5

1.5 " GRODAN ROCKWOOL CUBES 2/6/12/28/ 50/100

$8.95



Grodan Round Rockwool Macro Plugs 1.5

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

$7.28



HYDROPONIC SYSTEMS EXPANDED CLAY PEBBLES ROCKS GROW MEDIA LITRE MEASUREMENTS picture

HYDROPONIC SYSTEMS EXPANDED CLAY PEBBLES ROCKS GROW MEDIA LITRE MEASUREMENTS

$8.85



Grodan 1

Grodan 1" x 1" A-OK STARTER PLUGS Rockwool Cutting Clones Cubes Propagation

$14.99



PERLITE (FAST SHIP) QUALITY COURSE- MEDIUM SEED STARTING NURSERY POTTING PLANTS picture

PERLITE (FAST SHIP) QUALITY COURSE- MEDIUM SEED STARTING NURSERY POTTING PLANTS

$49.95



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

$22.39



Grodan 1.5

Grodan 1.5" x 1.5 inch Sheet of 98 Stonewool A OK Starter Plugs rockwool media

$22.50



1 LB Clay Pebbles Grow Media Expanded Rocks , Hydroponic Aquaponic , Hydroton picture

1 LB Clay Pebbles Grow Media Expanded Rocks , Hydroponic Aquaponic , Hydroton

$10.95



Grodan 1.5

Grodan 1.5" Inch A OK Starter Plug Cubes 12 Count Rockwool Hydroponic Grow Media

$8.95



Coconut Husk Coir Chips 100% Natural Organic Growing Media Orchids, Anthurium picture

Coconut Husk Coir Chips 100% Natural Organic Growing Media Orchids, Anthurium

$80.51



5kg/ 650g Coco Coir Brick Coconut Fiber Potting Soil Plant Organic Growing Media picture

5kg/ 650g Coco Coir Brick Coconut Fiber Potting Soil Plant Organic Growing Media

$43.48