Winter hardiness refers to the bees having an extremely good unity, so that in spring they come out at the same power as they wintered.
But for the winter to be as good as possible, and for the bees not to be affected.
We need to take into account some very important aspects.
All treatments should be performed on time, quality food should not be missing from the bee family.
The queens should be extremely well selected, so as to make sure that it can provide us with the best possible winter.