Re: Terry's query on what hardy or tender means.
I'm not convinced either is a very scientific term and I'm sure my
answer isn't! The words tender and hardy are not confined to
Pinguicula. They apply equally to all plants. Generally tender plants
come from tropical and sub-tropical climates and these plants are unable
to withstand frost. Hardy plants come from temperate climates (i.e.
where seasonal chilling brings below freezing temperature and plants
from such areas are called hardy as they are able to withstand
sub-freezing temperatures.
Degrees of hardiness or tenderness vry and you will always find plants
that are slightly tender or slightly hardy, so they survive short frosts
but can't survive prolonged freezing. Occassionally, plantsa from
tropical or sub-tropical countries can prove to be hardy but these are
exceptions.
Hope that helps.
Regards
Paul