The main differences between hydroponics and soil growing should now be clear to the reader. Not only is the soilless garden exact and controlled in its functioning, but it also cuts out many time-consuming and laborious jobs necessary in conventional plant cultivation. Messy manures, often smelly and slow-acting, are replaced by clean, swiftly available, mineral nutrients and the frequently unreliable earth or expensive and troublesome composts are eliminated completely in favour of an easily handled aggregate, or other supporting device. These advantages, together with many others already discussed, are what have made so many lovers of plants turn to hydroponics as the ideal system for use in the home.