So what about real Christmas trees? Well, we know what they are made of… an all natural, all renewable source. But there are some components of the Christmas tree industry that aren’t quite as green. Most trees are harvested after 8-12 years, and require maintenance over that period. In addition to watering, some Christmas tree farms use pesticides and chemicals for pest control and to speed growth. Also, when it comes time for delivering those trees to Christmas tree lots, they must be transported by truck to the local communities.