The extra oxygen around the roots is able to speed the plants' uptake of nutrients. Plants grow faster hydroponically because they are able to assimilate nutrients faster. They are able to take in food as fast as they are able to utilize it. Hydroponics works well for horticulturists who are willing to spend a few extra minutes a day in their garden. The garden requires extra maintenance.
Plants grow faster and there are more things to check.
In fact, some people do not like hydroponic gardening because plants grow too fast and require additional care. Hydroponic gardening can become overwhelming for the novice gardener if too complex of a system is implemented at first if you are a novice gardener and want to garden hydroponically, try setting up a basic system. Once you have gained experience and feel comfortable with hydroponics. Remember, if you buy all the new little hydroponic garden gadgets available, you may start more projects than you can manage effectively. If you are contemplating constructing and inventing your own unit, get your hands wet with a tried and true system first it will take a month or two to work out most of the bugs in a homemade unit.