High Pressure Aeroponics (HPA)
Definition - What does High Pressure Aeroponics (HPA) mean?
High pressure aeroponics (HPA) is one of two types of aeroponic growing systems. In an aeroponic growing system, plants are not grown in soil. Instead, they are grown with their roots hanging suspended in the air while a nutrient solution is delivered to the roots in the form of a fine mist.
High pressure aeroponic systems deliver the mist to plant roots at a high pressure, generally around 120 PSI.
MaximumYield explains High Pressure Aeroponics (HPA)
HPA growing systems were developed by NASA. It has been reported by NASA that HPA is the most efficient way to grow plants in outer space. However, many studies have proven the benefits of growing plants in an HPA system on Earth as well. Additionally, all HPA growing systems are aeroponics; however, not all aeroponic systems are high pressure.
HPA systems must operate at a high pressure in order to be effective. This pressure is used to atomize water and create water droplets of 50 microns or less. Plants are more willing to absorb nutrient water.
HPA systems are more effective than their low-pressure counterparts. However, HPA systems can be less cost effective and require more specialized equipment to build.