The carrot did not really show much growth. There may have been a hint of leaf production but nothing substantial and no root development. The portion of the carrot the remained submerged looked rather nice, though it had a mildly slimy texture by the end of the experiment. The top portion of the carrot shrivelled up and discolored. Next time I plan to keep just the stem part out of the water. Next time I also need to find another way of suspending the carrot, as it kept tipping over in the bottle's neck when I changed the water.
The onion seemed to be growing. There were, at least, roots forming, as seen in the photo. There was no indication of top growth, suggesting that next time I need to leave more onion on the scrap. The onion, too, would benefit from being suspended in a different way. In this case tipping wasn't an issue but the outer layer of the onion that was in constant contact with the bottle began to rot. The onion is buried in the carrot bed next to my mystery garlic. We'll see if it survives being planted out and grows.
I probably would have allowed the onion to grow more before moving it but I need the green house for another experiment (seed starting for a three sisters garden). Stay tuned for more scraps!
*I will have to make a post dedicated to these. Probably in the fall when there aren't so many interesting growing things to post about.