Visit the website of the National Christmas Tree Association  to learn how to best dispose of your Christmas tree. A traditional part of the post-Christmas cleanup has been leaving the old Christmas tree on the curbside for the local garbage collector to pick up and tote to the landfill. More and more often these days, however, landfills are off-limits to Christmas trees and most other foliage or yard waste.
If your local landfill refuses to take your Christmas tree, then you might want to consider calling your nearest arborist to see if Christmas tree recycling is among the services. Not only do recycled Christmas trees save on landfill space, they also provide much-needed and good-quality mulch for the professional and amateur gardener. The Tree Care Industry Association will be able to help you locate arborists in your area.