Cocos Brix

Hydroponic growing with stable pH value

Find a store

Product information

Cocos Brix makes the ideal substrate for growers who prefer to use a pure and natural product. Cocos Brix has been treated with calcium and flushed with clean water afterwards, therefore creating a very stable substrate which does not contain any fertilisers. It is particularly suitable for fast growing plants. Furthermore, Cocos Brix have a high water retention capacity so you can give less water. Cocos Brix meets the most stringent quality standards and is awarded the RHP Certificate for Consumers. It can be re-used as a soil improver. Cocos Brix produces the highest yields in combination with Plagron Cocos A&B and the additives from Plagron.


Immerse 1 piece of Cocos Brix in a bucket containing 4 litres (1.05 gal) of water and regularly squeeze the brick. After 20 - 30 minutes you will have about 7 litres (1.85 gal) of ready to use cocos substrate. Add nutrients each time you water and set the pH to 5.5.


Buffered coco peat, buffered coco fibres.

pH 6.1 - 7.4
EN13037 pH (H2O)

EC 0.09 - 0.14
E.C. (1:1.5) [mS/cm]


Cocos Brix is available in one package containing 6 pieces.

We advise adding 4 litres of water per Cocos Brix. This creates 7 litres of coconut substrate.

Yes, the quality is identical.

Depending on your tap water quality, the pH buffer in our Cocos Brix will be used up quicker or slower. Cocos Brix can be used for growing for six months at least without any problems.

After a bad harvest, you should take into account that part of the nutrition dosed has not been absorbed by the plants. This means that the substrate cannot be re-used. It is best to change the Cocos Brix in any case after six months.

Cocos Brix

Product video

A Cocos Brix package consists of six pressed blocks of coconut substrate, no bigger than a handbag. One block of Cocos Brix produces seven liters of substrate. A complete package is therefore good for no less than 42 liters (!) of coconut substrate.

Cocos Brix is delivered in pressed block forms, which makes it manageable and therefore easy to transport. This is a great advantage over bags. You can easily prepare the coconut blocks for use by soaking them in a bucket of water. 

Because Cocos Brix is fully flushed and buffered, a low EC value is guaranteed. Therefore, it is a given that you are growing with a coconut substrate that is clean and pure. All unwanted salts have been flushed out during several buffering steps. This prevents your plant from having problems absorbing nutrients during growth and flowering. When you give your plant Cocos A & B, in the right dosage, it can be absorbed by the plant properly. Because of the low initial EC-value, a calcium deficiency is prevented. For the correct dosage download our standard 100% COCO growing schedule.

The high quality of the Plagron coconut substrates is confirmed by the RHP quality mark. The RHP quality mark guarantees the correct quality requirements and sustainable origin of the substrate. For example, Cocos Brix has excellent water retention and is free of sand, weeds and pathogens. This means that Plagron coconut substrates are clean and pure, and you can use them safely without risk to your grow.


Want to know where to buy this product? Or perhaps you’re looking for a custom schedule or just a helping hand? Our Tools have got you covered.

Grow Schedule Calculator


Substrate Selector

Grow topics

Grow knowledge: we've got plenty of it. We think these Grow topics may be of interest to you.

Identify symptoms of nitrogen deficiency in plant leaves

Phosphorus deficiency

Low level of potassium in leaves: Symptoms are shown during flowering.

Calcium deficiency in plants: Plant leaves turning brown and curling up