In 2001 it was estimated that 1% of the world's food is grown using hydroponics. Most commercial crops of tomatoes and many other greenhouse crops are grown hydroponically. Commercial growers use hydroponics because it gives bigger crops for less work. With no soil to use for growing there are no weeds and fewer disease and pest problems. There is also less waste of water and nutrients because these are continuously recycled. All these factors help to reduce the costs of growing food crops for business.
Water conservation makes hydroponics a very important method of agriculture for hot climates, enabling people to grow crops in difficult places like the Middle East, Australia and Africa. It is easy to see that a gardener in a part of the world where transport of fertilisers is difficult finds hydroponics a good option.
More recently there has been an increase in hydroponic growing by amateur gardeners, enthusiasts and people looking for a more sustainable and environmentally friendly way of growing. With constant increasing costs of foods many realise not only the financial but health benefits of growing your own produce. Hydroponic growing makes growing your own produce accessible to anyone with whatever space they have available.
Legal issues
A large amount of hydroponics equipment is purchased for the purpose of growing cannabis. However in the UK it is legal to sell everything you need to grow cannabis, lights are bought by gardeners and the other equipment is also unrestricted, it is also legal to sell the cannabis seeds.
It only becomes illegal when you germinate the seeds, then the other equipment would then be used by the police for prosecution purposes but they would still be legal to own.