There are a vast amount of different kinds of growing medium. Anything that a plant can grow in is considered a growing medium. There are man-made as well as organic (natural) mediums. Even air can be an effective growing environment for roots.
I have been asked many times what growing medium is the best. This is like asking what is the best colour? Or what is the best kind of vehicle to own. The answer depends on the job you need it to do. You wouldn't try to use soil in an Aeroponic system and you don't plow a field with a BMW. However, if you want to grow organically in pots then the soil would be an excellent choice, and a Tractor can handle the field (save the BMW for a night out). The best growing medium for your purpose depends on many variables. The type of system you are using, what kind of crop you are growing and local environment are just some of the many determining factors involved when choosing a growing medium. There may be more than one medium that will work equally well for your particular needs. Many times it boils down to availability, price or personal preference. At the Dampkring we stock all the growing mediums you'll ever need to grow on and give advice about which one might best suit your circumstances.