It is important that a place be chosen where the bees will be protected
from cold winds in the spring after they are taken from the cellar
and again in the fall before they are taken to the cellar. A grove of
trees or an adjacent hill usually offers the best protection, or it
is possible to make an artificial windbreak such as a high fence. A
natural windbreak usually is better, for it is more extensive in most
cases. Too much reliance should not be placed in buildings, for often
they merely divert the wind slightly and may make conditions worse. A
fence made of close boards usually is unsatisfactory, for it causes
whirls.