Plants need nutrients air water & light with a little warmth to survive. Traditionally these have been provided by soil but hydroponic techniques allow plants not only to survive but also to thrive by gaining the perfect balance of nutrients from a regulated solution. Offering step-by-step instruction on how to build you own hydroponic systems this straightforward guide demonstrates how to arrange & automate a greenhouse & advice on how to grow a variety of plants & control pests. It covers the flood & drain method drip feed nutrient film technique aeroponics & aquaponics. It also contains a detailed examination of nutrient content & the strength of solutions. Without the need for stooping or weeding hydroponics is ideal for anyone with back problems or mobility impairment & superb for children who can follow & monitor the plants' growth.