Some of you may be interested in this. Last September I had 3 Nepenthes,
including N.tobaica, in my greenhouse (unheated) when I was caught off guard
by an overnight freeze that went beyond the forecasted minus 2 C and went to
about minus 7 Celsius. Arrgh! A lot of foul language and profanities flew
that morning!
Near zero temperatures are usually no problem in my greenhouse because of
the design I use based on the heat capacity of water and latent heat of
freezing. See my next message below for more information on the greenhouse
design.
Needless to say a lot of plants looked dead once they thawed out that
afternoon. My tomatoes and cucumbers were toast, which was to be expected,
but my Nepenthes' leaves turned limp and dark-brown like tanned leather; and
that was heart breaking. Most of my CP have since recovered and some like
my Sarracenia didn't really notice the freeze. I trimmed back the Nepenthes
to their bottom 6 inches of stalk to avoid mold, rot and that sort. And then
I waited... and waited.
Last week I noticed two small buds unfolding in the leaf axils of my N.
tobaica. I am still hopeful about my N. khasiana that used to perform so
well in the mild winters of the Pacific Northwest near Vancouver but I don't
expect much from my N. ventricosa.