In article , Peter Richards
writes

If you had read all of what I had said, you would have noticed I
mentioned a hothouse. Snow, frost, daylight hours, warmth, etc,etc are
quite irrelevant in a hothouse with artificial light and heating.

Well, not quite irrelevant ;-)

It costs me a lot more to maintain my greenhouse at a cactus-friendly
temperature when there is snow and frost outside ;-)
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm