An aeroponic system, made in the 1980s, enables even control over the root system delicately and does not require media. Using a high pressure sprayer with a micro-inject nozzle, water or a nutrient solution is sprayed around the roots by a water pump and provides a highly oxygenated nutrient solution to plants (Fig. 2f).Supports maintain the pots or plants, the water or nutrient solution is in a mist form, and is supplied for a specified period using a special nozzle and an electronic timer. Customizing the misting cycles to particular plants is important, because their roots are exposed to the air and can dry rapidly. The mist can easily be affected by the outside temperature, which makes these systems difficult to operate under cold or frigid conditions. This system is rarely used commercially because the system is expensive for installation and maintenance as it needs frequent cleaning to prevent plant disease and clogging of spray heads. Also, partial failure of the aeroponic systems may easily cause damage or kill plants.