null
Created with Sketch. Created with Sketch.

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:

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 favourite 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 pre-soak 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.

 

  • Grodan Gro-Wool Absorbent Granulate

    Grodan Gro-Wool Absorbent Granulate

    Granulated rockwool works great on its own or mixed with other loose media, such as expanded clay rocks or coconut fiber. If planting in containers outdoors, water absorbent granulate is the best medium of choice.

    $103.75 $83.19
  • Grodan Classic Slab 30/75 12 in x 3 in x 36 in - Case of 8

    Grodan Classic Slab 30/75 12 in x 3 in x 36 in - Case of 8

    Gro-Slabs™ provide the final stage for growing a spectacularly large plant. Transplant your Gro-Block™ plant onto a slab just like professional growers. They come in clearly marked biodegradable UV-resistant sleeves for comfortable handling and algae...

    $164.85 $132.28
  • Grodan Expert Slab 20/75 8 in x 3 in x 36 in - Case of 12

    Grodan Expert Slab 20/75 8 in x 3 in x 36 in - Case of 12

    Gro-Slabs™ provide the final stage for growing a spectacularly large plant. Transplant your Gro-Block™ plant onto a slab just like professional growers. They come in clearly marked biodegradable UV-resistant sleeves for comfortable handling and algae...

    $163.55 $131.17
  • Grodan Expert Slab 15/75 6 in x 3 in x 36 in - Case of 12

    Grodan Expert Slab 15/75 6 in x 3 in x 36 in - Case of 12

    Gro-Slabs™ provide the final stage for growing a spectacularly large plant. Transplant your Gro-Block™ plant onto a slab just like professional growers. They come in clearly marked biodegradable UV-resistant sleeves for comfortable handling and algae...

    $126.35 $101.40
  • Grodan Gro-Block Improved Mini-Block, 2" - Case of 1440 Grodan Gro-Block Improved Mini-Block, 2" - Case of 1440

    Grodan Gro-Block Improved Mini-Block, 2" - Case of 1440

      Grodan Product Documents Grodan Starter Mini-Blocks Safety Data Sheet Grodan Starter Mini-Blocks Mini-Blocks™ sit in a tray (flat) without support for easy starting of seeds and cuttings. These Mini-Blocks are individually wrapped in white...

    $579.75 $438.04
  • Gold Label Hydrocorn 36 Liter (65/Plt)

    Gold Label Hydrocorn 36 Liter (65/Plt)

    Gold Label Hydro Clay Pebbles are manufactured using a mix of the best qualities of pure clay. They are baked in an open furnace using high grade clean fuels. This guarantees absence of heavy metals or other contaminates. Gold Label Hydro is the inert...

    $1,565.95
  • Grower's Edge Block Covers, 6 in - Pack of 40

    Grower's Edge Block Covers, 6 in - Pack of 40

    For blocks of rockwool and other grow media. These Grower's Edge Block Covers blocks light from media?ùwhich helps reduce algae. Use white side up to reflect light. Use toothpick to hold cover in place. Hole in center of cover measures 1/2 inch in...

    $23.12 $16.46
  • Grower's Edge Block Covers, 4 in - Pack of 40

    Grower's Edge Block Covers, 4 in - Pack of 40

    For blocks of rockwool and other grow media. These Grower's Edge Block Covers blocks light from media?ùwhich helps reduce algae. Use white side up to reflect light. Use toothpick to hold cover in place. Hole in center of cover measures 1/2 inch in...

    $13.41 $10.18
  • Mother Earth Hydroton Original Clay Pebbles, 50 Liter Mother Earth Hydroton Original Clay Pebbles, 50 Liter

    Mother Earth Hydroton Original Clay Pebbles, 50 Liter

    Mother Earth Product DocumentsMother Earth Hydroton MSDS The original Hydroton brand expanded clay is a unique, lightweight expanded clay aggregate made in Germany. This natural clay is mined, formed into pellets, then kiln fired at high temperatures to...

    $41.39
  • Mother Earth Hydroton Original Clay Pebbles, 10 Liter Mother Earth Hydroton Original Clay Pebbles, 10 Liter

    Mother Earth Hydroton Original Clay Pebbles, 10 Liter

    Mother Earth Product DocumentsMother Earth Hydroton MSDS The original Hydroton brand expanded clay is a unique, lightweight expanded clay aggregate made in Germany. This natural clay is mined, formed into pellets, then kiln fired at high temperatures to...

    $14.81 $13.49
  • Gro Block Improved Mini Block 2" (Shrinkwrap/Strip)

    Gro Block Improved Mini Block 2" (Shrinkwrap/Strip)

    Grodan ImprovedGro Block Improved Mini Block 2" Shrink wrapped/StripGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and...

    $470.22 $465.22
  • Grodan GR40 Uniblock 8”x8”x4” Baby Mama, case of 36

    Grodan GR40 Uniblock 8”x8”x4” Baby Mama, case of 36

    Grodan ImprovedUniblock GR40, 8" x 8" x 4"Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for...

    $191.65 $166.71
  • Gro Block Improved Medium 4"GR7,5 w/ hole 4"x4"3.1" Shrink/S

    Gro Block Improved Medium 4"GR7,5 w/ hole 4"x4"3.1" Shrink/S

    Grodan ImprovedGro Block Improved GR7.5 Medium 4" w/Hole 4" x 4" x 3.1" Shrink wrapped/StripGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone...

    $294.10 $283.86
  • Gro Block Improved Large 3"GR5,6 w/ hole 3"x3"x4" Shrink/Str

    Gro Block Improved Large 3"GR5,6 w/ hole 3"x3"x4" Shrink/Str

    Grodan ImprovedGro Block Improved GR5.6 Large 3" w/Hole 3" x 3" x 4" Shrink wrapped/StripGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool...

    $306.71 $296.03
  • Rocket Earth 1.5CF Bag

    Rocket Earth 1.5CF Bag

    Rocket EarthRocket Earth was designed for the grower who enjoys a fast draining medium. Based on grower’s grade Manitoban long fiber peat moss, Rocket Earth is one of the best indoor and greenhouse blends on the market today. Rocket Earth allows the...

    $31.95 $28.78
  • Grodan Gro-Block Improved Mini-Block, 1.5" - Case of 2250 Grodan Gro-Block Improved Mini-Block, 1.5" - Case of 2250

    Grodan Gro-Block Improved Mini-Block, 1.5" - Case of 2250

      Grodan Product Documents Grodan Starter Mini-Blocks Safety Data Sheet Grodan Starter Mini-Blocks Mini-Blocks™ sit in a tray (flat) without support for easy starting of seeds and cuttings. These Mini-Blocks are individually wrapped in white...

    $514.66
  • Grodan Delta Hugo with Hole, 6" x 6" x 6" - Case of 64

    Grodan Delta Hugo with Hole, 6" x 6" x 6" - Case of 64

      Grodan Product Documents Grodan Delta Product Data Sheet Grodan Delta Safety Data Sheet The Foundation for uniform and perfectly controllable propagation of plants. Details Grodan Delta is the basis for an easy to steer propagation process,...

    $248.33 $222.81
  • Grodan Delta 4 with No Hole, 3" x 3" x 2.5" - Case of 48 Grodan Delta 4 with No Hole, 3" x 3" x 2.5" - Case of 48

    Grodan Delta 4 with No Hole, 3" x 3" x 2.5" - Case of 48

      Grodan Product Documents Grodan Delta Product Data Sheet Grodan Delta Safety Data Sheet The Foundation for uniform and perfectly controllable propagation of plants. Details Grodan Delta is the basis for an easy to steer propagation process,...

    $332.45 $246.19
  • Root Royale CocoPure 50L RHP Certified

    Root Royale CocoPure 50L RHP Certified

    Root Royale Cocopure is a natural growing medium produced from premium grade coconut husks. Root Royal has a high water absorption rate and maintains 30% air porosity, which results in optimum growing conditions for your plants. The coco coir consists of...

    $44.95 $23.07
  • Root Royale Clay Pebbles 50L

    Root Royale Clay Pebbles 50L

    ROOT ROYALE™Hydro Clay Pebbles are an environmentally friendly grow medium that can be reused over and over again! These clay pebbles have been fired in super-heated kilns causing them to expand and become extremely porous. These tiny holes and...

    $54.45 $24.52
  • FloraFlex FloraCaps 8'' x 8'' 2.0

    FloraFlex FloraCaps 8'' x 8'' 2.0

    Place the revolutionary, patent-pending FloraCaps™on your 8" Rockwool cubes, and maximize your space in the Vegetative cycle. flower designed louvers block light, while allowing air, water, and nutrients to your plant. • Reduce your top...

    $31.99 $8.95
  • FloraFlex 7.5 in - 12 in Round FloraCap

    FloraFlex 7.5 in - 12 in Round FloraCap

    The FloraFlex 7.5-12 inch Universal Round FloraCap is a patent pending revolutionary tool for top feeding that also helps eliminate algae. The FloraCap is designed to give you a more consistent flow rate, even distribution, increased air flow, and...

    $29.99 $4.58
  • Grodan Delta 5.6 with Hole, 3" x 3" x 4" - Case of 32 Grodan Delta 5.6 with Hole, 3" x 3" x 4" - Case of 32

    Grodan Delta 5.6 with Hole, 3" x 3" x 4" - Case of 32

      Grodan Product Documents Grodan Delta Product Data Sheet Grodan Delta Safety Data Sheet The Foundation for uniform and perfectly controllable propagation of plants. Details Grodan Delta is the basis for an easy to steer propagation process,...

    $306.71 $246.13

Most Popular