According to the German timber industry association, Germans are expected to purchase about 29 million Christmas trees this season. Christmas is the most important holiday in Central Europe and many retailers depend on it for as much as half of their annual sales. Shoppers carry their trees at a Christmas tree farm on December 12, 2010 in Mellensee near Berlin, Germany. A mother and her children search for a tree at a Christmas tree farm on December 12, 2010 in Mellensee. Santa Claus walks with kids through a Christmas tree farm.