Ugh…I tried rerooting celery from the stalk I bought two weeks ago. Its been a week and even with changing the water daily and really watching it, my celery turned out like this. Its rotting and smelly. I’m very disappointed, but at least I tried. No roots have grown either. Yuk!!!
Life of a Frugal Wife 
I also had an epic fail at this and I can grow almost anything…
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What happened was that the stalk was cut too short for regrowing. Next time look at the end of the celery before you buy it. There are some with more of the root end than others. Around the outside edge you should see some small hair like growths. That’s the roots. If you don’t see any then they’ve all been cut off.
The only way to actually re grow a celery is to put it into soil as soon as you see roots growing. It is kept in water only long enough to start the new roots. Harvested celery you purchase hasn’t been grown in water alone so we can’t expect a second growth to work in water alone either.
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Umm, I mean it was cut too short in the picking / packing process. All the root stems are missing so it can’t re grow.
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It was store bought, it was a clean end like it was cut with a knife. I tried it, It failed. Grrr. oh well, I tried. Thank you for the information though! At least I will know what to look for.
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