I thought the yellow, wild ones were located in very few locations. Near Sandbridge Road, in Virginia Beach, VA. & further south, were gigantic Nelumbo, along the ditches, with those huge flowers & five foot tall leaves,, at a Wildlife Refuge ( Mackey Island?). I forgot, if it is nucifera, or actually nymphacea, that were the wild yellow sort & how far north, they do grow. I would think those N. lutea from Northern localities, would be much more winter hardy than the southern population.
