59N: It has been pretty cold here at night too. But not under 5-6 degrees C, thank you god.
Update.
I test planted two of my tallest and strongest Nirvana Sky´s about 1-2 weeks ago, and they are thriving. I think it´s true what they say about autos, that they are more cold resistant then photos. These didn´t even seem to notice that it was cold out.

Maybe they don´t grow as much vertically as they wore going to if they wore grown indoors. But the stems are getting thinker.
I carried a shovel out into the woods, and hid it under a "christmas tree" one day before the planting, and when the time came to start digging i couldn´t find the shovel.

I hid it so well that not even i could find it.

So right now the garbage bags with the soil are just sitting on the ground. I have to get a new shovel. I am thinking of buying one of those foldable ones. It´s much lighter and easier to carry, and much much more discreet. We´ll see.
Anyways... the ones i have outside don´t have a fence yet. And i don´t think i am going to put one up either. I just pee on the ground around the plants when i´m there and checking on them, and it seems to help. There haven´t been any deers or other pests there (yet). I am thinking of starting to collect my urin in bottles so i always have enough make a strong predator odour. No slugs either, but i am going to wrap the stems with copper wire proactively so i can keep the slimey, nasty things away in the future.
The rest are moving out tomorrow if the rain stops. I am going to take some pics tomorrow.
Good luck to all you other growers on all different lats. Keep up the good work.
/H.