NFT means Nutrient Film techniques. With this system the depth of the recirculating stream is very shallow, like a film of water, hence the name ‘nutrient film’. The plants are rooted in an inert growing medium, like rockwool. An in-line pump circulates nutrient enriched water through the plant’s root system. The inert growing media gives you the freedom and control to be much more exacting about how much water and nutrients the plant gets. With this system the plant roots are exposed to an adequate supply of water, oxygen and nutrients. This technique is mainly used for plants that are harvested relatively quickly, such as lettuce and herbs.