I just got a steal at a local nursery sale...an alberta spruce topiary full grown. I am thinking of putting it in a pot and keeping it as a decoration in front of the garage, south facing. I am wondering if potted trees need more protection during the winter. Maybe I need to sink it into the ground for winter. I'd rather use it as decoration in front of the house if it would not hurt the roots during cold spells in the teens or lower.