Hydroponics is a method of growing plants without soil, instead using mineral nutrient solutions in a water solvent. Plants' basic needs for water, light, and nutrients can be met through this method, which involves placing plants in water containers and supplementing the water with liquid fertilizers and using clay mediums to support the roots. Hydroponics allows plants to be grown year-round indoors, makes administering nutrients easier, and avoids issues like insects, weeds, and fertilizer runoff.