A few months ago, just for fun and curiosity, I decided to plant onions from the sprouts that were growing out of preexisting organic onions that had been purchased at the grocery store. Out of the eight that I had planted, four of them survived. Of the four, I had one that was decent-sized and used successfully in a delicious risotto recipe...yummy! Two of the onions stayed fairly small, although I left them in the dirt as long as possible to see if they'd get any bigger. The fourth and final onion remains to be seen, as it is still resting comfortably in the dirt of my garden.