Coconut Coir is often the medium of choice for hydroponics enthusiasts. Coconut coir holds eight to nine times its own weight in water and more air than premium brand rockwools.
In addition, coco coir, unlike rockwool, is bio-degradable which makes it perfect for the garden as a mulch. Beware however, not all coco coir products are created equal. In fact, most are not suited for use in hydroponics due to high levels of sodium and other impurities. Because of this, where possible, purchase coir that has been presoaked and pre-buffered. Coco coir that has not been presoaked needs to be flushed with large amounts of water to remove sodium. We recommend the following coco coir products:
Coco coir has a very strong cation exchange ability. This means that the medium can hold and release nutrient elements according to:
Large amounts of potassium are naturally present in coco coir. Potassium competes with Calcium and Magnesium. Buffering and specialised plant nutrition are designed to compensate for this.
There are several nutrients that are specifically formulated with coco coir’s unique characteristics in mind. By using a nutrient specifically formulated for the coco coir-based system, you are ensuring that your plants are receiving the best possible nutrition. We recommend the following coco nutrients:
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