Hi all,
I'm new here, because my swedish is very bad. :(
This summer I planted some hardy palms outdoors, though we had very cold weather they grew satisfactory. Now all the "palm-bed" is covered with styrofoam shields and snow. The temps were out minimal to -10 C and under the cover (without heating) +3-5 C. Now there's about 0 but after new year night the frost to -15 will come. The spring will show results...
With best wishes
Antti