These coconut husks are the coconut fruit?s outer coat, which is made up of long fibres and sponge-like pith particles. With excellent tree bark becoming scarce, these offer a preferable alternative to bark-based growing media. The smaller particle, the dust, that is considered ?coco peat? is called ?pith.? According to research, a 50/50 blend of chips and Coir has a suitable amount of water and air retention, making it the blend of choice for tomatoes. For berries and cucumbers, a mix of 75 percent chips and 25 percent Coir works well. A mix of 25% chips and 75% Coir has a high water retention rate and a low air capacity, making it ideal for heavy water users like tomatoes and peppers.