As part of our hydroponic and aquaponic sections, we have created this growing media summary page.
Growing media forms a crucial part of any hydroponic or aquaponic system. A grower's choice here can have functional, financial and logistical implications. Unfortunately, the array of available materials and products is mind-boggling, and it seems more are being developed every day. Each product has its own combination of affordability, weight, water retention, pH impact, dust, and availability. No one type is "the best" for all circumstances. Different system setups, different crops, different growing plans and marketing plans will each dictate slightly different optimum combinations. And of course our wallets often have a fairly significant contribution to make in which type we select. So how is a grower to choose? We offer this summary table to help you make that choice.
The below summary table provides a quick rundown of the different growing media types, and their various pro's and con's. Each growing medium in the table also has a dedicated web page describing that material in much greater detail. For those media which we have used here, we have provided a summary of our own experiences while using that product. Those individual pages are available via the hyperlinks in the table.
|Cost||Weight||pH Impact||Water Retention||Dust/Debris||Availability|
|Gravel||Low||High||Possibly||Lowest||Needs Initial Rinse Only||Common|
|Lava Rock||High||Medium||No||Medium||Needs Initial Rinse Only||Uncommon|
|Hydroton||High||Medium||No||High||Needs Initial Rinse Only||Uncommon|
|Perlite / Vermiculite||Low||Low||No||Medium||Perlite Needs Initial Rinse||Common|
The above table provides a huge amount of information. It took us awhile to compile it, and it will take awhile for anyone new to this topic to digest all the possibilities. If you are trying to decide which tyep to use, we invite you to read through these individual pages, and take your time. I hope somewhere in this you found some answers to your own growing needs.
We are continually looking for more product options. If you hear of another material that we haven’t covered in the above summary table, let us know and we’ll add it to the list above, with a complete review. If you have more questions about one of the options already listed, let us know and we’ll look at answering those questions. This website exists to help you with your growing goals. Let us know if there’s any other way we can help you achieve those goals.
We're not the only ones who are comparing and evaluating various products. Academic institutions, hydroponic and aquaponic companies, and individuals are researching all these products and posting what they've learned. For instance, the University of Arizona released this growing media comparison between rockwool, perlite, coir and blends, for use in tomato cultivation. This senior research project from Lynchburg University compared soil, gravel and coir in two different aquaponic systems. Google "hydroponic growing media comparison" for many more such reports and articles.