Hydroponics is growing plants without dirt. Plants are grown with their roots in an inert medium. The medium can be perlite, rockwool, coconut husk, or rocks. They key is you keep the roots exposed to a nutrient rich water solution.
Hydroponic systems come in many didn't shapes and sizes. Today I'm going to demonstrate how to make a simple system using mostly things you have around the house. I did this with my 7 year old daughter on a recent snow day so it's also a great indoor winter activity.
visit captainhydroponics.com for more hydroponic system ideas or to just learn more about it.