Hydroponics is a subset of hydroculture, which is a method of growing plants without soil by instead using mineral nutrient solutions in a water solvent. In hydroponics plants may be grown with only their roots exposed to the nutritious liquid. In hydroponics, the roots may be physically supported by an inert medium such as perlite or gravel. The nutrients used in hydroponic systems can come from fish excrement, duck manure, or purchased chemical fertilizers. Plants commonly grown hydroponically include tomatoes, peppers, cucumbers, lettuces, and even marijuana.
A single length of drainage pipe cut into six pieces and mounted on a bamboo scaffold.
