What distinguishes hydroponic growing from traditional methods?
In hydroponics, plants are grown in nutrient rich water without soil. Traditional methods use soil as the growth medium.
Hydroponics is the science of growing plants without soil, with their roots in a nutrient rich water solution, and sometimes stabilized by a medium such as gravel or perlite. Traditionally, plants are grown in soil on farms or greenhouses or gardens.
The image below shows a NASA researcher checking hydroponic onions with Bibb lettuce to his left and radishes to the right