I pulled an onion from a bag that had sprouted bright green shoots a couple inches long. It looked kind of pretty, so I stuck it sprouts end up in a jar of water and put it in the window sill. Within just a couple days it started growing roots like crazy from the water end and the sprouts at the top have grown a lot! My question is, what do I do with it now? Should I just leave it in the jar of water and cut the green part off to use in cooking and let it re-grow and keep doing that, or should I plant the whole onion in dirt, and if so, how? It's doing quite nicely in the jar, but I don't know what to do with it now...
