The Garden Bug: Recycling Christmas trees
By Brenda Weaver
Pine needles dry quickly but decompose slowly, making excellent groundcover around foliage, especially creeping plants such as strawberries. If you live near a lake or pond and your tree is chemical-free, toss branches into the water to make sheltering habitat for fish. Use branches as "starters" for a firepit.
Source: www.thisoldhouse.com