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.
Using aeroponics—the same technology NASA uses—Tower Garden grows plants with only water and nutrients rather than dirt
This 3 inch PVC vertical hydroponic setup with this new 1.5 inch design which is easier to maintain, uses less water and energy, and practically doubles my marketable production.
This version produces 133 heads of lettuce or comparable 8.5 inch green vegetable and contains an additional 18 sites for larger plants such as herbs and kale.This setup uses 6 inch vent pipe and LED light bulbs with a 20% reduced lumen output and 30% increase in energy savings per fixture over my previous 4 bulb T5 fixtures.