Any marginal plant - such as reeds, sedge, water mint, rushes, willowherd etc. etc. etc.
the plant grows but not too well
it grows
Well, when you plant a flower in the soil usually it has some ingredient in it then when you water it it sucks the water up through the stem. Then it grows like us and when it eats it grows like US!
lily pads
they grow by sun and water
It grows when you plant and water it.
A cactus?
A plant that grows only in or on water.
seeweed
it grows
It grows well in the southern United States.
Mangrooves