a term that covers several different cultivation techniques, all of which have in common that they are cultivated without soil as a medium. It is a productive and cost-effective cultivation method that provides plenty of air for the roots, better control of fertiliser and pH. Plants therefore grow faster and stronger in a hydroponic system. The hydroponic system can be divided into two categories: top-feed and sub-feed, where the irrigation is done from above or below. Examples of systems include: run-to-waste drip irrigation, NFT, DWC, ebb & flow, wick-hydropnics, aeroponics, etc.