If you have a Christmas tree to recycle, please follow the procedure for your local community program so that the trees can be recycled into compost or materials. Insects and diseases which may be on the cut trees could escape and spread if the trees were used as mulch in homeowners' yards.
Other popular holiday plants such as poinsettias, azaleas, or cyclamen can also be recycled. Remove the foil wrapping off the containers (for better drainage) and put the outdoor plants somewhere sheltered until you can plant them. The heated air in your home will dry out both these outdoor plants as well as your indoor plants. You may want to check those indoor plants too.