Romaine Lettuce Experiment

My last kitchen scraps experiment, growing pineapple tops failed. And this is the summary of my romaine lettuce experiment, which I would also conclude as a failure.
June 17, 2015
6.17.2015

June 18, 2015
6.18.2015

June 19, 2015
6.19.2015

June 20, 2015
6.20.2015

June 21, 2015
6.21.2015

June 22, 2015
6.22.2015

June 25, 2015
6.25.2015

July 10, 2015
7.10.2015

I found it dried out last night and added water to it. Still, it was looking pretty sad so I took this last photo before I tossed it out. It was growing a pretty healthy root system in the water. I think if I’d added some fertilizer or maybe even something as simple as epsom salts, it might have done better? Either way, it didn’t seem like I was going to grow another head of lettuce big enough to eat.