Why do some plants die (do not produce fruits or leaves) even if they are in water?
info about science behind plants
They may not get enough sunlight. They might not have the right type of soil. Their roots might not be deep enough. They may be drowning in all of the water; some plants can't take in all that water at once.
They also need soil and a lot of sunshine.
If there is nothing but water around the roots, the plant will not get air into the roots, which that part of the plant needs. Also, too much water can support bacteria or fungi that attack the plant.