Answer: I've heard that, too. There is some truth to it, although the plant doesn't have to start all over, it just has to adjust. Roots that develop in water get their oxygen from the water and as long as the water is freshened periodically, there will be adequate oxygen for the roots. In soils, there is far more oxygen available to roots (because of soil particle sizes). So, the roots must adjust to this. Most roots do.
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