In order to grow a species of fungi you need to source the mycelium of a strain that will reliably fruit if grown in the right conditions. The mycelium has to be cultured in a form that can be worked with depending on the techniques involved. The standard practice of cultural fungi using sterile/aseptic culture techniques involve the preparation of agar media. Liquid culture techniques have become much more widely used and accessible in the past few years and has several advantages over agar media. For some species low tech methods of culturing fungi can be applied such as using cardboard, however this has limitations and is best to be considered as a method of creating spawn.