Coco coir  made from shredded coconut husk is great medium for soilless gardening. Besides gardening, we see coco coir used for reptile bedding, and mycology. Coco coir  used as a stand alone works great or when amended with other mediums. Combine coco coir with perlite, earthworm castings, vermiculite, pumice, or various trace minerals to achieve desired results.