there are also some few other plants, but almost 99% are lithops: some Dinteranthus vanzylii and 7 other mesembs, 6 cacti and 5 stapelias.
It`s a kind of an experiment, lithops are frost resistant in some extend, but day time temperatures are usually higher in south of Africa. And the new leaves are growing in the "winter resting period".
I will see, what happens. I think, they will be rather slow in the spring.