Contrary to popular belief, hydroponic cultivation is also one of the most efficient of all approaches to growing cannabis…not to mention just about everything else, for that matter. Research has shown that hydroponic cultivation systems use somewhere in the region of 40% less water than soil setups. This is because rather than allowing excess water and nutrients to simply run off and go to waste, excess is both collected and automatically reused in an effective hydroponics system. The fact that growing conditions are also managed with such pinpoint precision can also make these kinds of systems surprisingly energy efficient.