Regrowing Romaine Lettuce

I recently watched a video on YouTube and the presenter cut up a romaine lettuce and mentioned that if you wished you could regrow the lettuce. A few days later I was cutting up several heads of romaine lettuce and thought about regrowing them, so I googled and found another YouTube video with a short and easy how to guide. And it is really easy. Take the cut off end of the romaine lettuce and put it in a little water, perhaps half an inch of water, change and/or replenish the water daily. After one day a little growth had taken place, after a week they had grown to five or six inches in height. After two weeks it is recommended that they be planted in soil to finish growing because at that point they need more nourishment that just the water alone can provide. My mom likes iceberg lettuce so she took the cut off end and placed it in water, and it too started to grow. Below are four pictures taken over the course of one week.