The next time you have green onions, don't throw away the white ends. Simply submerge them in a glass of water and place them in a sunny window. Your onions will begin to grow almost immediately and can be harvested almost indefinitely. Just use kitchen scissors to cut what you need for meals. Periodically empty out the water, rinse the roots off and give them fresh water.
Growing Celery From Discarded Bottoms Its one week old and look at all that celery growing up. Half of the base is submerged in water, and when the celery has roots, you can plant it out in the garden. The celery hasn’t been in direct sunlight, just in the window. Recommend using organic celery.
Save the end from your lettuce and put into a little water (about a half inch). Change out the water every day. The lettuce will grow back incredibly quick too. The one on the left i cut today. The middle one yesterday and the one on the right, the day before. You can see how much it grows in just two days!! But don't feel limited to romaine. This technique can also be used with green onions and celery — from Addicted to Networking.