The term tender(cold susceptible) can be used to describe any plant that
will suffer from
light frost. These plants generally come from
sub-tropical regions and need special care when planted out
of their native
. This plants cannot
outside during the
temperatures drop below 4°C, and must be
overwintered inside before the first
killing frost. In the
north country this can be anytime from mid-September to October.
Tender plants are suited for indoor and requires a minimum
temperature of 10-15°C although some of they may tolerate
to below this level. So, it's also vital to wait until the last
for your area before to move them outdoors.