[bitterwort]

Thanks, Greyghost, that sounds like good advice (about mid-thirties). I've just potted mine UP to plugs the equivalent of a 72-cell flat. Can't go near anything larger until the snow disappears for good. I think plan to move things in at night and out for the day. I may leave an experimental pot of P. integrifolia out in the greenhouse, just to see how it does--the fancy hybrids, though, will migrate for a bit.

Thanks!