Fully grown arborvitae shrubs do not require burlap for winterizing, as they are large enough and strong enough to survive harsh winter months without protection. However, if your arborvitae is still within its first three growing seasons, covering the shrub in burlap will protect it from damage due to snow. The burlap creates a physical barrier to help keep the shrub dry, yet it allows airflow to help keep the plant healthy.
Drape the burlap over the arborvitae and draw a line around the burlap approximately 6 inches off the ground.
Cut the burlap to size with a pair of scissors.
Drape the burlap over the arborvitae and gather the ends together around the trunk of the shrub.
Tie a piece of twine around the gathered burlap to close off the bottom opening. Do not overtighten the twine, or you could cut into the bark. However, do not apply the twine so loosely that you risk the burlap blowing off during winter winds.
Protect the arborvitae after the first frost and before the first projected snowfall.