Continue stacking trees until the pile reaches five to six feet in height and a width of 15 to 20 feet. Please note that this structure is temporary, as decay will render the rabbitat unusable in three to four years, at which time it may be refurbished. Replacing old Christmas trees with new ones each year keeps the rabbitat usable. This will encourage native vegetation to grow in and around the rabbitat, which increases its productivity for rabbits. Finally, you might consider converting your tree into mulch that can be used in your landscape.
Organic mulches decompose on the soil surface and add valuable plant nutrients to the soil.
Also, the organic mulch provides a good environment for earthworms and other soil organisms which are necessary for healthy soil. Because wood mulch contains a lot of carbon and little nitrogen, the microorganisms responsible for breaking down the mulch will have to draw upon nitrogen that's already present in the soil, leaving less available for your plants. If you need to mix green mulch directly into the soil, it would be a good idea to add a nitrogen-containing fertilizer.