Can plants live only in water?


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Can plants such as Iron Cross (clover) and Dandelion live only in water, instead of living in soil? Dandelions, for example, can live for around 10-13 years. So, can they still produce flowers, seeds, and still live for 10-13 years, if the dandelions are put in only water?

As far as i know, rotting of the roots is happening only when the soil is too wet/moist, but rotting can't happen if the plants are put only in water and i replace the old water with fresh water every day, right?
 
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You need an oxygen source like an aquarium bubbler or pump and a small reservior. They do this all the time in hydroponics. The water has some balanced nutrients of course. They pump out the water and let it flow. The oxygenation and chemical balances prevent rot. You would probably not want to use straight tap water which often has pH and sanitary modifiers added.
 

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