Green onion

With the climbing price of grocery, one would notice that all your friend is now growing green onion in their own kitchen.
1.  Must change water daily.
2.  Do not put too much water (not pass the white bulb)
3.  They grow much faster when they are placed near a window, with an except of super cold weather.  When it gets really cold outside, bring your green onion away from the window to avoid the draft.