Hydroponics is a method of hydro culture and is a technique for growing plants without soil. Mineral nutrient solutions provide the nutrients required by the plant, completely negating the need for soil as a source for the plants nutrients.
Plants may be grown with their roots anchored in a growing media such as expanded clay aggregate, growstones, or rock wool. The roots may also be submerged directly into the nutrient solution without a growing medium.
Hydroponics is a fast growing agricultural advancement, and is proposed to be one of the more practical solutions to feed or ever increasing populations into the future.