Given the OP's first question, I don't think (s)he understood the structure of roots must change radically if the plant is to adapt to inundation; or, that a plant can do well grown in water or a solid grow medium, but odds of failure are overwhelmingly high if it is grown in a pot with no drain hole, full of saturated soil.
.... much better to make something clear at the risk of being redundant than leave standing something ambiguous enough that it can detract from the growing experience of others.
Al
