Hydroponics is a subset of hydroculture, the method of growing plants without soil, using mineral nutrient solutions in a water solvent. Terrestrial plants may be grown with only their roots exposed to the mineral solution, or the roots may be supported by an inert medium, such as perlite or gravel. The nutrients in hydroponics can be from fish waste, duck manure, or normal nutrients. While you can grow almost anything hydroponically, some vegetables will thrive in hydroponic systems more than others. What will grow best in your water garden depends on the particular system you decide to use. For beginners, a simple raft system is ideal. It’s easy to make, doesn’t cost much to get going and will give you vegetables much more quickly than conventional gardening methods. Choose vegetables that don’t mind moisture and that don’t get too big for the raft.