orchids which stand frost/low temperatures

[Burgos]

hi, this is my first thread, im from spain so im sorry about the language if it is not really good

well, here´s my question, i´d like to know if anyone grows orchids outdoors in places where it freezes but also where the frost or very low temps hold for a long time.

i´ll tell you my situation, here where i live it´s pretty cold in winter. we usually get frost (from october to april-may) but the prpblem is not frost, but the low temps that stay during the whole day.
example: at night -5ºcelsius (like 25 farenheit) and during the day 2 or 3 º celsius (like 36 farenheit)

do you grow any orchid in that conditions?

i grow a cambria since last year in the balcony which has flowered this year, and i suppose cymbidiums also do well with that temps.
this year im going to try with oncidium, cattleyas, potinara, brassia, and epidendrum. i think they stand low temps because they are hybrids.

do you know of any others? and not just hybrids, but species? maybe coelogyne cristata and dendrobiumm nobile?? some more please

thanks