There are two schools of thought when it comes
to cleaning heavy snow off shrubs, and both have their own merits. One
school feels you should leave things alone until weather improves, since
there is a high likelihood of breaking extra branches with your attempts.
Worst of all, would be cutting off some bent
branches that will eventually spring back when weather improves.

No need to be in a rush on this cherry, since it will probably have to
be completely removed
The other school of
thought is the sooner you get heavy snow off shrubs the better. I’m inclined
to agree with this second school of thought for a couple reasons.
First,
some trees and shrubs in the Arborvitae family don’t fair well in heavy snow
storms anytime. As soon as snow starts to build-up on these fragile evergreens,
branches begin bending. Once they are slightly bent, they become susceptible
to even more snow build-up and breakage.
Second, would be
if you have some
neatly pruned pom-pom evergreens in your yard. It is far
too easy for ‘sticky’ snow to build-up on these expensive specimens
and either lay them open or bend them over. Neither situation has a good
outcome.
Third would be the trees and shrubs with softwood. You know the
ones, they break first in every storm. Ornamental Pears come to mind first,
but are usually too tall to effectively knock the snow off.

Ornamental Pear ruined
by heavy snow accumulation
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