This is another great idea I saw on Pinterest! Gosh I love that website! So anyways, I know that I knew this a long time ago, but seeing it again made me want to try it! You can pretty much indefinitely keep growing new green onions without ever have to buy new ones again! Just keep your white ends with the roots, and put into a tall glass with water at the bottom, leave in a sunny window and watch them sprout from the cut tops, almost instantly!! I'm growing mine in a champagne flute, how classy!
So this is not even 24 hrs later, and look at the growth! I'm going to take a photo everyday until they are ready to use again! I know I'm a geek, but I find this so much fun to watch!