Hydroponic gardening is a system that allows plants to be grown without soil. Instead, they absorb nutrients through their roots in water, sand, gravel or air. This allows the plants to grow more efficiently, which translates into faster growth. Because no soil is needed, gardeners can get more use out of even the smallest spaces, making hydroponic gardening a great choice for apartment dwellers and those in densely populated urban environments as well as those who simply want to get the most out of their gardening efforts.More gardeners are discovering every day how easy and beneficial it is to get started with hydroponic growing techniques. Many pests live in the soil, which gives them easy access to plants, but when there is no soil, there is also no risk of insects, soil-borne diseases or even weeds. Plants will be healthier, and even though the garden may be small, that healthier environment can ensure greater productivity.