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Hydroponic Grow Media

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Hydroponic Grow Media

Hydroponic Grow Media

If you are not too familiar with hydroponics, you may be under the impression that it involves growing entirely in water. However, the reality is that sometimes you need to use grow media for a hydroponics system too. The reason is, it is needed to anchor the roots so that the plant can be supported in place. When you are growing outdoors traditionally in pots, garden soil is the most common choice. For hydroponic systems, you need a specific growing medium.  

What is a hydroponic grow medium? 

The term ‘hydroponic grow medium’ refers to an inert material that is used to anchor your hydroponic plants in their place. Since it is inert, it does not provide any minerals or nutrients to your plants. It is possible to make your own hydroponic grow medium, but there are several great options available in the market, including: 

Coco coir  

Clay pebbles and growstones 

Rockwool 

Hydroponic foam 

The best hydroponics growing medium  

The right growing medium for you depends on your specific requirements, and each of them has its pros and cons. Here are some brief details about each of them: 

Coco Coir 

Coco coir is derived from coconut husk and is 100% organic. It boasts of exceptional drainage abilities and water retention qualities. You can find it in various consistencies and utilize its superior germination capabilities to start your clones and seedlings.  

There’s another great thing about this hydroponic grow medium – it is entirely renewable. Since coconut husk does not have any other use, when you use it as a hydroponic grow medium, you are actually playing your part in environment conservation – which is a win-win situation! 

Clay pebbles and grow stones 

Clay pebbles and grow stones are 100% inert and also pH neutral. You can use them again and again for different grow cycles, and are sure to find them extremely sustainable. Manufactured from recycled glass that has been made smooth through sanding, these lightweight grow stones, and clay pebbles are a popular choice for a good reason.  

Check out our detailed guide on clay pebbles and grow stones to learn more! 

Rockwool 

Rockwool is created by melting rocks, which are then spun into fibers. This is a favorite choice for many growers because it offers excellent aeration and water retention. Its unique composition allows it to avoid getting degraded or broken down, which may be a problem when you want to get rid of it by disposing of it naturally.  

Rockwool is a preferred choice for many growers but if you opt for this option, make sure you remember to balance their pH using a pH adjuster. The rockwool cubes may have high pH.  

Hydroponic Foam and Oasis Cubes 

Oasis cubes, also called hydroponic foam, is another great choice for a hydroponic medium. Made from polyurethane, it is resistant to algae, porous, and does not alter your hydroponic system's pH.  

The good thing about this option is that it does not cost you much. There is also no need to presoak the cubes. However, one thing that some growers may not like about oasis cubes is that they are not sustainable or organic.  

Buy the best hydroponics grow medium at Groindoor.com 

If you need help with choosing the right hydroponic grow medium, the experts at Groindoor.com can help you. Reach out to our experts at 866-GRO-INDR or read our guide on the complete range of hydroponic media in our learning center 

 

 

 

 

 

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  • SunGro Horticulture Sunshine Mix #4, 3.8 cu ft (compressed)

    SunGro Horticulture Sunshine Mix #4, 3.8 cu ft (compressed)

    Sungro/Sunshine Advanced

    MSRP: $71.95
    $55.35
    Sunshine Mix #4 - 3.8 cf compressedThis quality SunGro product is recommended where high air capacity and fast drainage are needed: during winter months, with water and salt sensitive crops, or where frequent leaching is required. Ingredients:Canadian...
    MSRP: $71.95
    $55.35
    Qty in Cart: 0
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    MSRP: $71.95
    $55.35
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  • The Soil King Big Rootz, 1.5 cu ft bag The Soil King Big Rootz, 1.5 cu ft bag - Hydroponics

    The Soil King Big Rootz, 1.5 cu ft bag

    The Soil King

    MSRP: $40.95
    $30.69
    Big Rootz Bag - 1.5 cubic feetBIG ROOTZBig Rootz® is carefully formulated to meet the needs of professional growers, yet it's so easy to use that even novice gardeners can achieve growing success. Use it for indoor grows or outdoor greenhouses, or add it...
    MSRP: $40.95
    $30.69
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  • Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool, 3.5 cu ft

    Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool, 3.5 cu ft

    Grodan

    $197.19
    Gro-Wool Medium Water Absorbent Granulate, 3.5 cu ftGranulated rockwool can be used alone or as an amendment to organic based mixes. For example, the addition of water absorbant granulate to peat mixes at 25-50% volume increases water holding capacity...
    $197.19
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  • Grodan Pro Delta 4 Block, 3" x 3" x 2.5" with hole, case of 384, Commercial

    Grodan Pro Delta 4 Block, 3" x 3" x 2.5" with hole, case of 384, Commercial

    Grodan

    MSRP: $210.80
    $117.40
    Grodan Pro Delta4 Block, 3"x3"x2.5" w/hole, case of 384,commGrodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes...
    MSRP: $210.80
    $117.40
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  • Grodan Pro A-OK 36/40 6/15 Starter Cubes, 1.5" x 1.5", 30 sheets of 98, Commercial

    Grodan Pro A-OK 36/40 6/15 Starter Cubes, 1.5" x 1.5", 30 sheets of 98, Commercial

    Grodan

    MSRP: $411.35
    $380.37
    Grodan Pro A-OK 36/40 6/15, 1.5"x1.5", case of 2,940, commGrodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes...
    MSRP: $411.35
    $380.37
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  • Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4"

    Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4"

    Grodan

    MSRP: $1,695.00
    $1,227.54
    Grodan Pro Delta 10, 4"x4"x4" loose on pallet, no box, 1,548 blocksNote: This bulk item is shipped as a full pallet without boxes or retail labeling.Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then...
    MSRP: $1,695.00
    $1,227.54
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  • Grodan A-OK 25/40 10/10 Cubes, 1" x 1", 30 sheets of 200

    Grodan A-OK 25/40 10/10 Cubes, 1" x 1", 30 sheets of 200

    Grodan

    MSRP: $606.18
    $584.10
    AO 25/40 10/10 Cubes, 1x1", 30 sheets of 200The renewed plugs result in a maximum number of useable and homogeneous seedlings. Both form and strength have been greatly improved for good machine and manual processing. Whether sowing or transplanting, the...
    MSRP: $606.18
    $584.10
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  • Grodan Round Macro Plugs w/Slit, case of 2000

    Grodan Round Macro Plugs w/Slit, case of 2000

    Grodan

    MSRP: $368.58
    $362.05
    Macro Plug, round plug with slit (2000/cs)These rockwool plugs feature a slit for easy insertion of rooted cuttings. They fit perfectly into the hole of any standard rockwool block or any other type of growing medium.
    MSRP: $368.58
    $362.05
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  • Grodan Grow-Cubes, 5.6 cu. ft. - Loose in box Grodan Grow-Cubes, 5.6 cu. ft. - Loose in box - Hydroponics

    Grodan Grow-Cubes, 5.6 cu. ft. - Loose in box

    Grodan

    $123.85
      Grodan Product Documents Grodan Grow Cubes MSDS Grodan Gro-Cubes Grow-Cubes are small loose 1/2 in cubes of stonewool. Advantages are better aeration, maximum drainage so that you can hardly ever overwater your plant, easy mixing with other...
    $123.85
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  • Grodan Improved Hugo 6" x 6" x 5.8", 512 Blocks Loose on Pallet Grodan Improved Hugo 6" x 6" x 5.8", 512 Blocks Loose on Pallet - Hydroponics

    Grodan Improved Hugo 6" x 6" x 5.8", 512 Blocks Loose on Pallet

    Grodan

    MSRP: $1,735.66
    $1,602.40
    Grodan Hugo Improved 6" x 6" x 5.8", loose pallet, 512 blocksGrodan Improved Hugo (White Foil) 6" x 6" x 5.8" (512 blocks Loose on Pallet) Grodan ImprovedGrodan partnered with the Wageningen University and Research facility in The Netherlands and top...
    MSRP: $1,735.66
    $1,602.40
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  • Grodan Improved GR10 (White Foil) 4" x 4" x 4", 1,584 Blocks Loose on Pallet Grodan Improved GR10 (White Foil) 4" x 4" x 4", 1,584 Blocks Loose on Pallet - Hydroponics

    Grodan Improved GR10 (White Foil) 4" x 4" x 4", 1,584 Blocks Loose on Pallet

    Grodan

    MSRP: $1,573.77
    $1,439.44
    Grodan GR10 Improved 4" x 4" x 4", loose pallet, 1584 blocksGrodan Improved GR10 (White Foil) 4" x 4" x 4" (1584 blocks Loose on Pallet) Grodan ImprovedGrodan partnered with the Wageningen University and Research facility in The Netherlands and top...
    MSRP: $1,573.77
    $1,439.44
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    MSRP: $1,573.77
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  • Grodan Pargro QD Biggie Block with Hole, 6" x 6" x 6" - Case of 64 Grodan Pargro QD Biggie Block with Hole, 6" x 6" x 6" - Case of 64 - Hydroponics

    Grodan Pargro QD Biggie Block with Hole, 6" x 6" x 6" - Case of 64

    Grodan

    $229.64
    Grodan Product Documents Grodan Pargro Safety Data Sheet Pargro Quick Drain Stonewool Grodan Pargro line has been modified to be the driest value-priced Rockwool on the market. Pargro is the leader among affordable horticultural Rockwool. There are...
    $229.64
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