Well, actually it is generally accurate, from the 200 or so varieties of hardy and tropical waterlilies I tinker with
Photo below shows tropical waterlily starts after a week of growth in Spring, over a month since last freeze (in a cold frame doing 70°f-90°f) its going to be at least one to two months before they bloom.
These include some of the most cold tolerant of all tropical waterlily known, the Micrantha hybrids
At the same time, the earliest hardies in outdoor ponds have pads at surface, and buds about to pop in a weeks time
Care to specify the names of the five species of tropical waterlily that flower through ice.
It usually takes tropical waterlilies one to two months to bounce back from waters cold enough to have ice, if they had over wintering surviving tubers from which to sprout
Some photo's of these unheard of marvels would be of interest
Regards, andy
http://www.flickr.com/photos/21940871@N06/http://s93.photobucket.com/albums/l42/adavisus/
