Professional substrate made of selected and calibrated bark to best meet the specific cultivation needs of the main orchid genera such as Cymbidium, Phalaenopsis, Cattleya, Dendrobium, etc. The mixture is suitable for both epiphytes and semi-epiphytes. For these types of plants, a highly porous and stable product is needed, with reduced water retention to avoid stagnation and root rot. It is a product permitted in organic farming, therefore it can be used by those who want to carry out cultivation with organic or biodynamic methods.