Nutrient Film Technique (NFT)

A hydroponic method in which nutrient solution is fed into grow tubes or trays in a thin film where the roots draw it up. The nutrient solution flows through the tubes to keep the solution fresh. This “nutrient film” allows the roots to have constant contact with the nutrient and the air layer above at the same time. A downside of nutrient film technique is that it is particularly vulnerable to power outages.