Don't just throw them in the trash, but use the biomass accumulated in these trees to the end: chopping them into wood chips to spread under plants, composting or burning in the oven - explains Anna Malinowska spokeswoman for the State Forests. Christmas trees can also be planted later, providing we bought them in pots. However, one has to remember - explains the spokeswoman of the State Forests - that they were trees from the beginning grown in pots, i.e. with an already developed root system.