Hatchet_Jack
-37C is unusual, although in another town I was working in it got down to -42C one winter, not a good time to be walking and cars don't like it too much either (electric ones probably would just about get down the street before a recharge...) You can protect young plantings by putting fir branches around them as insulation but for the main, established stuff has to take its chance which is good if the snow cover is deep enough. Much depends on species, beautiful evergreens such as Laurels, Holly, Viburnum etc which abound in much of Europe are non starters here, evergreens like that freeze on the leaf and die back fast, I've tried Holly but it's never got past 3 seasons and weak growth, much is to do with the dark- since between Nov- Mid January it's about 4 hours twilight a 'day'. This spring's drought, cold temp and sunshine played havoc. Some years can be much milder though, similar in Australia I suppose with extreme summers or droughts, it varies.
You grow Peaches or Apricots where you are or nuts?
Crop of Gages and Plums from the garden, so even in the Arctic fruits will grow