Hi Thomas, Jerker, Linus, Christian, Henrik,
many thanks for kind words to my plants!
Them all grow at small piece of grownd close to southern wall of our house. Winter protection for all, inkluding Dicksonia is some peat at the bottom, then light garden textile, then frames with polyethilene, then styrofoam shields and at last, snow. The temps all winter long is about +2/+4C. No heating at all, the house wall is warm itself. And mice repeller inside. I hoped that winter of 2009-10 was exceptional, but this winter is maybe worse than last one. Let's fight to the last palm in Scandinavia ;)
Antti