Having tried regrowing a few vegetables from kitchen scraps in the past without success (except for the onions and garlic which always worked well), I had given up on the idea for some time. For some reason, though, this summer my micro-gardening experiments have taken off.
The amazing thing about this kewl flower is that the bud formed and then opened from a baseless and rootless upper stem. I had bought a bunch of leeks and tossed them in the refrigerator before learning that leek plants could be regrown from the basal parts. Then we got a hot spell and they bolted. Turns out that first cold and then hot is what triggers a bloom in this kind of plant, and once it wants to reproduce not much can stop it.
So I cut the bottoms off to root and put the tops in water to stay fresh until I got around to using them.
I make my sauerkraut in cabbage kvass, which is why there is a lot of liquid on top. In addition to drinking the kvass and using it as a kraut starter, I also ferment Daikon radishes with garlic in it, My kraut is made with cabbage, celery, sweet peppers, sweet onions, leeks, salt, and other seasonings. The radishes have a bite that would overpower the cabbage, so I serve them alongside rather than in the sauerkraut.