One of the priorities of the Park is the reconstruction of the original natural ecosystems in those areas which today are occupied by exotic species. The areas under restoration amount to about 500 hectares, concentrated in elevated areas on the southward facing side where the original vegetation was heather and myrtle (fayal-brezal).
The elimination of the pines from plantings carried out in the 1960s which now occupy these areas is done by means of successive clearings (that is to say by gradually reducing the density), followed by repopulation with plants of autochthonous species under the protective cover of the pinewoods. The pines which are initially left standing to give protection to the new plants over the first few years are subsequently eliminated.
In the areas covered by natural vegetation, human intervention is practically non-existent. Thus the woods evolve in a natural manner: the trees reach maturity and then die, decompose and all the material and energy goes back into the ecosystem. In Europe, where the majority of woodlands are intensely transformed, subject to human use, the forest in the Garajonay National Park is one of the few places where it is possible to visit woodland formations in a condition which is close to their original state.