The instructions were to put the left-over white part of your green onions in a cup of water, set it on a sunny windowsill, and watch them grow back. What did I have to lose, right?
So, here they are, when I first put them in the water.
Not even 24 hours later they had started to send out new, fat, healthy-looking roots. Well, now...this looked promising.
Yippee! This picture was about 48 hours later. The green onions are really growing!
This is 10 days after I first put the white parts in the cup of water: These are real, usable green onions!
(If this looks like more green onions that I started with, it's because it is. As I used up the onions I had in my fridge I stuck the white ends in the cup with the rest of them.)
Look at those roots!
So my experiment was a success! I don't know how long they will continue to grow, but I'll keep adding water, snipping the onions to use them, and we'll see how long they keep going!