House & Garden Coco is 100% coco coir with the lowest EC/ppm possible. House & Garden Coco is buffered and repeatedly washed to achieve the lowest EC/ppm on the market. Due to this super-low EC, we highly recommend feeding plants with House & Garden nutrients immediately after planting. House & Garden Coco has been sifted to remove sand and fine dust, creating an environment for ideal root growth. For added drainage, blend with up to 30% perlite.