Hi Maris,
It is my belief that even in Greece there are zones not suited for fig trees, and thus there are no fig trees in those particular zones.
In France, you can't have a fig tree in the higher mountains - Alps for instance...
Even here at my elevation, it is already tough and troublesome !
Even just 30 km away from me, some strains don't do it - they grow but don't ripen anything ! and others produce unreliably - every other year.
I lost most of my trees at -25°C ... so at -29°C ... I wouldn't want to give it a try .