Hydroponic Growing Media


This guide, we will give you the most popular types of hydroponic growing media. Every hydroponic gardener has their own preferences, so we will give you the advantages and disadvantages of each medium so you can choose the one that works right for your situation.



Coco Peat / Coco Coir



Coco peat is quickly becoming a favorite among hydroponic gardeners. It’s made from ground up coconut husks and represents a giant leap in hydroponic growing media.

To understand why ground coconut husks are becoming so popular, let’s take a look at what a coconut husk does for a coconut. Coconuts are grown in tropical regions, and often times they fall into the ocean when they are ripe. The husk protects the seed and flesh from sun and salt damage. Most importantly, the husk acts as a great growing medium for the coconut to germinate and create new trees.

Now apply these benefits to hydroponics. The ground up coco coir will act as a great hormone rich and fungus free medium for our plants. In the same way that it helps the coconut to germinate, it will help all of our seeds and seedlings to start strong. Coco coir has a great air to water ratio, so we don’t have to worry about drowning our roots. Best of all, it’s completely renewable. Coconut husks would generally go to waste or be composted if they weren’t used in hydroponic applications. Here, we’re taking what was once a waste product and re-purposing it to grow more plants!


Growing Tips

When coupled with fabric pots moisture problems can be avoided.

Built up salts can often be a problem, but there are many lines made particularly for coco that allow for easier flushing. Try using Canna Coco and Smart Pots.

Benefits of Coconut Coir

  • Usually organic

  • Sustainable

  • Compactable (buy compressed, expand at home…saves money on shipping)

Downsides of Coconut Coir

  • Holds a lot of water and may drown plants


Clay Pebbles or Clay Balls



What Are Expanded Clay Pellets?

Arguably one of the most popular media to use in days past has been hydroton expanded clay pellets. As their name suggests, these are made by expanding clay to form round balls of porous material. The best part about them is the fact that they release almost no nutrients into the water stream and are pH neutral. In addition, their spherical shape and porousness help to ensure a good oxygen/water balance so as not to overly dry or drown the roots.

In my experience, the only two downsides to using hydroton pellets has been their weight and their draining ability. In certain hydroponic systems, like ebb and flow, filling up an entire flood table full of hydroton is going to leave you with a very heavy system. They also drain and dry out very fast because there is much more space between each pellet than other hydroponic growing media. They can be used to great effect to line the bottom of an growing tray, when draining is an issue. Other than these two disadvantages, hydroton pellets are a great, re-usable media to use!​


Benefits of Expanded Clay Pellets

  • ​Reusable