I'm in zone 7B (Memphis), and here is how I do my plants. I harvest all (including the
blue tropical lilie) tropical lilie tubers. Roll in Captan, put in barely damp sand, in baggie,
in bucket with lid (mice love tubers), then store on north wall inside house where it
is constant approx. 60 degrees. The hardy water lilies and lotuses, I sink to the bottom
in one of the ponds. Parrots feather, anacharis -- I leave in ponds. Can't kill that stuff.
On water hyacinths, I've tried Vickie's method of storing few overwinter. I do well, until
February, then they die on me. So I don't try any more on hyacinths. One year I got
hyacinths to live for me, and that was very very mild winter, and I put piece of plastic
over one end of pond; they were under it.
Marie Fisher