Kratky method

Urban Farm DB summary

Developed by Bernard Kratky at the University of Hawaii and first published in Acta Horticulturae in 2009, the Kratky method is a passive, non-circulating hydroponic technique requiring no electricity or pumps. Plants sit in net pots floating over a nutrient reservoir; as the water level drops, an air gap forms between roots and liquid, letting "oxygen roots" develop. Considered the simplest hydroponic system, it suits leafy greens but not water-hungry crops.