Green Onions

Did you know you can grow green onions without soil?! I recently read that all you need to do is put the white portion of the onion in water and put in front of the sun and watch them grow! I currently have 3 whites in a juice glass with some water sitting in front of the glass block window in my master bathroom. I got pretty excited when I saw the green of the onion appear! So far I don't smell the onion, so we'll see if an odor comes with more green. I don't seem to have much of a green thumb, but maybe I have a green thumb for green onions! :) Happy growing.