Coco provides excellent insulation. Also, Coco isn’t prone to overheat due to excessive ambient air temperatures like many other mediums (making it ideal for warm geographic zones). This is because water tends to make its way into the lower regions of the coco coir, leaving the top layer relatively drier. Because of this, heat needs to penetrate a drier top layer of coco coir before reaching the watered areas of the media. Since water is a great conductor of energy (in the form of heat) the lower area is comparatively cooler, where the bulk of the root mass is found,. As media temperature and oxygen levels (air porosity) are interrelated (the warmer the media, the less oxygen), this insulation plays an important role in promoting root health and vigor.
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