Founded in 1991, the European Palm Society have been championing the growing of palms and other exotic plants in Europe and other Temperate areas of the world.
A comprehensive source of information on every aspect of growing palms.
Inspiring site of Emil Delsizov and his son. Shows pictures of many palms and exotics growing with winter protection in Ihtiman, Bulgaria, zone 6, altitude 950m. If they grow in Ihtiman what goes for the rest of the country ...
On the site they feature their personal weather station. Nice!