How to Grow Green Onions in a Jar

How To :

• - Use spring onions as you normally would. 
• - Save bulb leaving about a 2 inch stem. 
• - Put them in a small jar, covering roots with water. That’s it!
• - Put the onions where they will get some natural light. They will keep growing back! Use kitchen sheers to snip what you need.
• -Change the water every 3 days or so.

Source : How to Grow Spring Onions in a Jar